Up next CHASING 200-MPH | PART 2 Published on August 28, 2023 Author Mike Self Tags c10 syndicate, square body exhaust, Squarebody Syndicate, squarebody syndicate gauges, squarebody syndicate ss02, squarebody syndicate steering column, squarebody syndicate wheels, ss02 truck, syndicate series 02, syndicate series gauges, Share article Facebook 0 Twitter 0 Mail 0 Behind The Scenes! Squarebody Syndicate SS02 76 GMC Sierra Before | the Revel! Syndicate Series 02 is on its Way to Greatness Joe Yezzi has proven himself to be a square-body master—they’re in his blood. He grew up always having one of some sort in the family, and after breaking the world’s collective neck with his Syndicate Series ’01 C-10, Joe knew that he’d really have to raise the bar on his next build, so that’s just what he did. Joe’s latest is a ’76 GMC Sierra Classic 15 shorty that is being built as a tribute to the last known surviving 1975 GMC Indy 500 Hauler, which Joe also owns. That truck is currently being restored because of its historical significance; there was no way Joe was going to cut that one up, and we don’t blame him one bit. Subscribe to our weekly newsletter At the time of this writing, most of the metal finish work has been completed, and the cab sits perfectly atop The Roadster Shop Syndicate Series Spec chassis and matching RS air ride suspension with RideTech shocks. Custom 20-inch Syndicate Series turbine-style wheels by MCS and Michelin Pilot Super Sport rubber are the perfect complement to the forthcoming 1975-era paint scheme. When we asked Joe what else will be done before the truck is ready for paint, he shared, “Nick [Sininoris] and the crew at Hubcaps Hotrod Design will be cutting out and replacing the whole firewall to fit and hide all the brackets and components. They’ll also build the upper core support to match, along with a complete, complex bed floor. The front and rear fender wells will be modified to fit the truck correctly, and the bumpers will be tucked. It’ll have a full custom roll cage, steering linkage, all of the gaps on the doors and hood will be set, and the front valance modified. Once the exhaust is done, the custom battery brackets and a ton of other stuff will get put on. Let’s just say anything metal on the truck is being touched by Nick and his crew.” THE SIGNATURE SYNDICATE SERIES SPEC CHASSIS BY THE ROADSTER SHOP PROVIDES A STURDY PLATFORM FOR JOE’S SIERRA, WHILE THE ROADSTER SHOP SUSPENSION SETS THE TRUCK RIGHT ON THE GROUND WITHOUT SACRIFICING PERFORMANCE. Although Joe’s original Indy Hauler didn’t have anything particularly special under the hood when GMC built it, the tribute truck will have the kind of power the original only wishes it could have been born with. A fully built, Magnuson blown GM Performance LS3, assembled by Charles at Pro-Dyno, will put out an estimated 600-630 rear wheel horsepower. American Powertrain has put together a beefed-up Tremec Magnum six-speed transmission, which should make the Sierra an absolute blast to drive, especially with the bulletproofed Currie 9-inch rearend and 4.11 gears. The interior will be very reminiscent of the original Indy Hauler’s, but it will be a bit more in tune with the truck’s high-performance capabilities, with Simpson five-point safety harnesses attached to the roll cage, as well as Syndicate Series gauges by Dakota Digital, and a Syndicate Series billet steering wheel from GSI. Empire Custom Upholstery will handle the soft goods, with good ol’ red, white and blue accents throughout. Joe may end up breaking a sweat while mashing the go pedal, so an Old Air Products air conditioning setup will help cool things back down when need be. WE WERE THINKING ABOUT GOING WITH A WHEEL LIKE THIS FOR ONE OF OUR PROJECTS, THEN BAM! JOE YEZZI BEATS US TO THE PUNCH. THESE AMAZING TURBINE-STYLE SYNDICATE SERIES WHEELS BY MCS ARE THE PERFECT ADDITION TO HIS INDY 500 HAULER TRIBUTE TRUCK AND ADD JUST THE RIGHT AMOUNT OF NOSTALGIA WHILE BRINGING IT INTO THE 21ST CENTURY. You’ll definitely be seeing more of the Syndicate Series 02 once it’s finished, and we have a sneaking suspicion that it’ll have a prime spot at SEMA. With as much love as Joe puts into every square-body he owns, this truck will be one for the history books, and it will no doubt be one of the most remembered trucks of our time. Stay tuned for the next round in this truck’s saga in an upcoming issue of Street Trucks. ST [divider] TRUCK SPECS [/divider] OWNER Joe Yezzi Squarebody Syndicate Phoenix, AZ 1976 GMC Sierra Classic 15 ENGINE Work performed by Charles at Pro-Dyno 2017 GM LS3 Magnuson Superchargers sixth gen TVS2300 Hot Rod blower Deburred block COMP Cams 231/240 camshaft Custom retro Syndicate Series valve covers by GSI Holley water pump Hooker headers Magnaflow custom 3-inch stainless exhaust Drive Junky accessory drive setup Drive Junky alternator Frost Bite cooling fans Frost Bite radiator Painless Performance wiring harness 2018 Tremec Magnum six-speed manual transmission by American Powertrain American Powertrain White Lightning shifter American Powertrain driveshaft CHASSIS & SUSPENSION Work performed by Squarebody Syndicate and The Roadster Shop Syndicate Series Spec chassis by The Roadster Shop The Roadster Shop parallel 4-link The Roadster shop control arms Firestone airbags RideTech shocks Wilwood drop spindles Baer Pro+ 14-inch brakes front and rear Wilwood brake master cylinder and booster Currie Enterprises 9-inch, aluminum center Detroit Trutrac differential with 1350 yoke and 4.11 gears Boyde Welding gas tank WHEELS & TIRES 20×9 and 20×11 Syndicate Series wheels by MCS 295/30ZR20 and 345/30ZR20 Michelin Pilot Super Sport tires BODY & PAINT Work performed by Hubcaps Hot Rod Design Tucked LMC Truck bumpers Roll cage Custom inner fenderwells Custom bed floor Custom gas filler Original-style LOF windows Spirit of ’76 GMC graphics Single-stage red, white and blue paint INTERIOR & STEREO Work performed by Empire Custom Upholstery Leather seating over GM seat Simpson five-point seat harnesses with camlock Syndicate Series billet steering wheel by GSI Machine Syndicate Series gauges by Dakota Digital Old Air Products climate control system Hook-and-loop carpeting Two Optima batteries Special Thanks From the Owner: “Nick Sininoris and the gang at Hubcaps Hotrod Design, Ron and the crew at Empire Custom Upholstery, Charles at Pro-Dyno, The Roadster Shop, AccuAir, Magnuson Superchargers, Magnaflow, Holley, American Powertrain, Currie, LMC, Painless Wiring, Dakota Digital, ididit, Precision Rubber, Billet Badges, Old Air Products, MAR-K, Boyde Welding, Optima Batteries, Covercraft, Vibro Solutions, GSI, Baer Brakes, Drive Junky, Xpress Metal Cleaning, CGS Kustoms, Prestone, Pacific Powder Coating, Royal Purple and GM.” FREQUENTLY ASKED QUESTIONS What is the best wheel size and offset for a 4/6 drop on a 1986 C10 Scottsdale truck? Choosing the Best Wheel Size and Offset for a 4/6 Drop on a 1986 C10 Scottsdale Truck Choosing the right wheel size and offset for your 1986 C10 Scottsdale with a 4/6 drop is crucial for both performance and aesthetics. Here’s a detailed breakdown to help you make an informed decision: Wheel Size and Offset Recommendations 15-Inch Wheels Advantages: Maintains a classic look and feel. Possible Complications: May require trimming on the lower control arm to avoid rubbing if the offset is incorrect. Recommended Offset: For a 15×8 wheel, a 4-inch backspace should work well up front. 17-Inch Wheels Advantages: Provides a modern appearance and often eliminates the need for extensive modifications. Offset Options: For a 17×8 wheel, consider a 4.5-inch backspace. If you prefer a narrower wheel upfront, a 17×7 with a 3.75-inch backspace can be a suitable alternative. Considerations for a Smooth Ride Trimless Installation: If you want to avoid trimming the lower control arm, moving to a 17-inch wheel is generally a safer bet. Tire Fitment: Larger wheels, such as 17-inch, offer more versatility with tire sizes. They can improve handling without sacrificing too much ride comfort. Style and Functionality: Balancing style with functionality is essential. While 20-inch wheels may seem appealing, they can be too large for the practical needs and aesthetics of a dropped C10. Common Practices Many enthusiasts opt to stick with 15-inch wheels and accept minor modifications or go up to 17-inch wheels to avoid extensive adjustments. It’s generally agreed that 20-inch wheels are too large and can detract from the intended look of a classic truck. Final Recommendations If you prefer 15-inch wheels: Use a 15×8 wheel with a 4-inch backspace but be prepared for possible trimming. For a modern touch without modifications: Opt for a 17×8 wheel with a 4.5-inch backspace. To avoid any issues upfront: A narrower 17×7 wheel with a 3.75-inch backspace can also work well. Conclusion The best wheel size and offset for a 4/6 drop on your 1986 C10 Scottsdale largely depends on your willingness to modify the control arms and your aesthetic preference. Whether you choose 15-inch or 17-inch wheels, ensure the backspace is appropriate to avoid unnecessary adjustments and maintain the truck’s classic appeal. What considerations should be taken into account when selecting wheels for a C10 truck with a 4/6 drop? When selecting wheels for a C10 truck with a 4/6 drop, there are several key considerations to keep in mind: Wheel Size 15-Inch Wheels: If you prefer to stick with 15-inch wheels, you need to be cautious about the offset and backspacing. These may require some trimming of the lower control arm to avoid interference, which might weaken the arm. 17-Inch Wheels: Moving up to 17-inch wheels can often provide a better fit without the need for trimming. This size strikes a good balance between style and performance. Larger Sizes: While some owners opt for sizes as large as 20 inches, this is generally considered too large for a drop of this magnitude and may not suit everyone’s aesthetic preference. Offset and Backspacing Offset Considerations: The offset of the wheel determines how far it sits inward or outward from the wheel hub. A correct offset is crucial to ensure there’s no rubbing against the suspension components or fenders. Backspacing Specifications: For a 15×8 wheel, a backspace of about 4 inches is often suitable for the front. For a 17×8 wheel, you might need a backspacing around 4.5 inches. If you prefer a narrower wheel, such as a 7-inch wide wheel, a backspacing of approximately 3.75 inches can be effective for the front. Performance and Handling Always consider how the wheel and tire combination will affect your truck’s handling and performance. Larger wheels can offer improved handling but might make the ride stiffer. Ensure that the wheels you choose are compatible with the brake system of your truck, particularly if you have upgraded to a bigger brake kit. Style and Personal Preference Aesthetic Fit: The chosen wheels should complement the overall look of your C10. Avoid wheels that are too large and might look disproportionate for a 4/6 drop. Trimming: If you strongly prefer 15-inch wheels but don’t want to compromise the structural integrity by trimming the control arm, carefully select the offset and backspacing. Alternatively, consider other modifications that can accommodate your wheel choice without impacting safety. Conclusion Selecting the right wheels involves balancing several factors including size, offset, backspacing, and personal style preferences. By carefully considering these aspects, you can choose wheels that not only fit well but also enhance the appearance and performance of your C10 truck with a 4/6 drop. What are some common issues and solutions when fitting wheels on a lowered C10 truck? Common Issues and Solutions When Fitting Wheels on a Lowered C10 Truck Lowering a classic C10 truck can dramatically enhance its aesthetics and performance. However, it also brings forth several challenges when it comes to fitting wheels. Here are some common issues and practical solutions to ensure your truck looks and performs its best. 1. Clearance Problems with Drop Spindles Issue: Many drop spindle kits, regardless of brand, can cause the lower control arm to make contact with the wheel rim, especially when using 15-inch wheels. Solution: Switch to Different Spindles: Consider using alternative spindle brands known for better clearance with 15-inch wheels. Increase Wheel Size: Moving up to 17-inch wheels can often solve clearance issues without extensive modifications. Adjust Backspacing: Adjusting the wheel backspacing can prevent the control arm from hitting the wheel. A common setup involves a 3.75 to 4-inch backspace for the front wheels. 2. Backspacing and Wheel Fitment Issue: Incorrect backspacing can push the wheels too far out or in, causing them to rub against the fenders or suspension components. Solution: Front Wheels: For 15×7-inch wheels, a backspace of around 3.75 inches is often adequate. If moving up to 17×8, consider a backspace of 4.5 inches. Rear Wheels: If you prefer a staggered setup, 15×8 wheels in the rear with a 3.75-inch backspace can work well. This setup provides a balanced look and ensures proper fitment without rubbing issues. 3. Rubbing and Grinding Issue: Even with the right wheels and backspacing, you might still experience rubbing, especially during hard turns or under load. Solution: Minimal Grinding: Some enthusiasts are open to grinding a small portion of the lower control arm to ensure proper clearance. This should be done cautiously to avoid compromising the structural integrity. Use of Spacers: Adding thin wheel spacers (around 1/4 inch) can help in achieving the necessary clearance without extensive modifications. 4. Rotors and Control Arm Clearance Issue: The thickness of the brake rotors can also affect the clearance between the control arms and wheels. Solution: Identify Rotor Thickness: Ensure you know your rotor thickness (commonly 1 or 1.25 inches) and choose spindles accordingly. Some configurations are more suited to specific rotor sizes. Consider Alternative Spindles: If persistent issues arise, switching to different spindles that accommodate your specific rotor size may resolve clearance challenges. 5. Fender Fitment Issue: Larger wheels and incorrect offsets can cause the wheels to stick out past the fenders, leading to an undesirable look and potential legality issues. Solution: Optimal Backspacing: Adhering to the recommended backspacing for your wheel and tire size helps ensure that the wheels sit flush or inside the fender wells. Custom Flares: If you prefer a wider stance, fender flares can provide additional coverage and enhance the truck’s appearance. Final Tips for Lowered C10 Truck Owners Balanced Approach: Combining different wheel sizes (such as 15s in the rear and 17s in the front) can provide both aesthetic appeal and practicality. Test Fit: Always test fit your wheels and suspension setup before completing the installation to catch any potential issues early. Consult Forums and Experts: Engaging with other C10 enthusiasts and experts can provide valuable insights and firsthand experiences to help you navigate any challenges. By addressing these common issues with thoughtful solutions, you can achieve a smooth and stylish look for your lowered C10 truck without compromising functionality or safety. What are the recommended backspacing measurements for 15×8 and 17×8 wheels on a dropped C10 truck? Recommended Backspacing Measurements for 15×8 and 17×8 Wheels on a Dropped C10 Truck When selecting wheels for your dropped C10 truck, ensuring the correct backspacing is crucial for optimal performance and fitment. Here’s a breakdown of recommended backspacing measurements for 15×8 and 17×8 wheels: 15×8 Wheels For 15×8 wheels, a front backspacing of 4 inches is generally recommended. This measurement helps maintain the proper clearance, ensuring that the wheels do not interfere with suspension components or the inner fender. Front Wheels: 4″ backspacing Rear Wheels: You can often use the same backspacing for the rear or adjust slightly depending on the desired stance and specific modifications. 17×8 Wheels When upgrading to 17×8 wheels, the backspacing typically needs a slight adjustment. A 4.5-inch backspacing is a common choice for the front, which provides the additional clearance needed for a larger wheel diameter without compromising performance. Front Wheels: 4.5″ backspacing Rear Wheels: Similar to 15×8 wheels, the rear backspacing can match the front or be modified to suit your setup. Alternative Considerations If front fitment remains a concern, considering a 7-inch wide wheel with 3.75-inch backspacing can also be an effective solution. This adjustment ensures the wheel does not protrude excessively and maintains proper handling dynamics. Front Wheels: 3.75″ backspacing (for 7″ width) Rear Wheels: Maintain backspacing according to rear wheel width and desired vehicle stance. By following these guidelines, you can achieve a balanced, visually appealing, and functional setup for your dropped C10 truck. How does the backspacing of wheels affect the fitment and clearance on a dropped C10 truck? The backspacing of wheels plays a crucial role in determining the fitment and clearance on a dropped C10 truck. When you lower a C10 using dropped spindles, the position of the wheels relative to the suspension components changes, making proper backspacing essential to avoid interference issues. Key Factors to Consider: Control Arm Clearance: Interference Potential: If the backspacing is not adequate, the lower control arm may come into contact with the rim of the wheel. This is especially common with wheels that have a wide profile, like 15×8. Safe Margins: Proper backspacing ensures that there’s enough clearance, typically aiming for at least a 1/4″ gap between the control arm and the wheel rim. Wheel Backspacing: Definition: Backspacing refers to the distance from the mounting surface of the wheel to the back edge of the wheel. This determines how far in or out the wheel sits relative to the vehicle. Impact on Fitment: A wheel with too much backspacing will sit too far inward, increasing the likelihood of rubbing against suspension components. Conversely, too little backspacing can push the wheel outward, potentially causing issues with fender clearance. Fitment Adjustments: When switching to dropped spindles, it’s advisable to select wheels with an optimal backspacing that maximizes clearance. It’s often beneficial to test-fit different backspacing configurations to find the perfect balance for your truck’s specific setup. Expert Recommendations: Consulting with manufacturers or forums can provide insights into tried-and-true setups that offer the optimal balance between aesthetics and functional clearance. By carefully considering backspacing, you can ensure that your dropped C10 truck maintains proper wheel clearance, avoiding mechanical issues and achieving the desired stance and performance. What are the potential fitment issues with using 16-inch and 17-inch wheels on a C10 truck with a 4/6 drop? Potential Fitment Issues with 16-Inch and 17-Inch Wheels on a C10 Truck with a 4/6 Drop When customizing your C10 truck with a 4/6 drop, it’s crucial to understand the fitment issues associated with using 16-inch and 17-inch wheels. 16-Inch Wheels Front Clearances: Adding a 16-inch wheel generally improves fit, but older vehicles might still experience some front clearance problems, especially with certain brake setups. Modifiers often use small spacers, typically around 1/4″, to correct minor clearance issues. In some cases, a bit of grinding might be necessary to ensure smooth operation. Rear Fitment: The major concern for 16-inch wheels tends to be at the rear due to potential interference with the 14-bolt axle. This is particularly true for a C10 with a lowered suspension. Backspacing: Exceeding a 4-inch backspace can push the wheels past the fender lip at the front. Ideally, keeping backspacing at or below 4 inches will maintain proper alignment and avoid any protrusion. 17-Inch Wheels Brake Compatibility: If your C10 uses larger brakes, such as the 1-ton brake setup, 16-inch wheels may not provide the necessary clearance. This is where 17-inch wheels become a more practical option as they offer greater room around the brakes. Turning Radius: The primary advantage of using 17-inch wheels is the improved turning radius due to the increased size. Larger wheels allow for better handling but require careful consideration of their overall diameter and width to prevent rubbing during sharp turns. General Fitment: While 17s generally fit well with fewer adjustments, double-checking the backspacing is still important. Avoid going beyond 4.5 inches of backspacing to prevent any negative impact on the truck’s stance and handling. Summary In conclusion, fitting 16-inch wheels on a C10 with a 4/6 drop may involve minor spacers and potential grinding, especially around older brake setups. Conversely, 17-inch wheels are often more straightforward, accommodating larger brakes and enhancing the vehicle’s turning ability. Both setups require careful attention to backspacing to avoid pushing wheels past the fender line. What wheel sizes and backspacing combinations have been successfully used on a dropped C10 truck without modifications? Successful Wheel Sizes and Backspacing Combinations for a Dropped C10 Truck When it comes to fitting wheel sizes and backspacing combinations on a dropped C10 truck without requiring modifications, there are several options that truck enthusiasts have found to work well. Here’s a breakdown of successful setups: Front Wheels: 15×7 with 3.75″ Backspacing: A popular choice, this size generally fits without modifications and offers a balanced appearance. 15×8 with 4″ Backspacing: This combination is widely used and often does not require clearance adjustments. Rear Wheels: 15×8 with 4″ Backspacing: Many users have found this setup to fit seamlessly in the rear. 15×10 with 5″ Backspacing: This size, paired with the indicated backspacing, tends to fit well without the need for additional modifications. Notes on Drop Spindles: If you’re using drop spindles, the configurations mentioned above have been reported to work effectively. For instance: 1.25-inch Drop Spindles: These drop spindles can accommodate the 15×8 with 4″ backspacing in the front and 15×10 with 5″ backspacing in the rear. Key Takeaways: 15×7 with 3.75″ Backspacing (Front): Offers a no-fuss fit. 15×8 with 4″ Backspacing (Front and Rear): Reliable and commonly used. 15×10 with 5″ Backspacing (Rear): Fits well and enhances the truck’s stance. When selecting your wheels, consider these patterns as a starting point. Always double-check fitment with your specific drop kit to ensure optimal results. Do you need to trim the lower control arm when using 15-inch wheels on a dropped C10 truck? When installing 15-inch wheels on a dropped C10 truck, one common concern is whether trimming the lower control arm is necessary. Here’s a detailed breakdown to address this issue: Wheel Size and Backspacing 15×8 Wheels with 4-Inch Backspacing: Many truck enthusiasts report that 15×8 wheels with a 4-inch backspacing tend to require some clearancing. Specifically, these wheels might cause interference with the lower control arm when the truck is lowered. Trimming the Lower Control Arm Potential Need for Trimming: Trimming the lower control arm can sometimes alleviate the fitment issues. However, it’s important to approach this modification with caution. Altering the control arm may weaken it, depending on the extent and method of trimming. Alternatives to Trimming Adjusting Backspacing: Opting for wheels with different backspacing could eliminate the need for trimming. For example, 15-inch wheels with a different offset might clear the lower control arm without modifications. Rolled or Trimmed Fender Lips: Another option to consider is adjusting the fender lips, though this is typically relevant to wheel diameter rather than control arm clearance. Expert Opinions Community Feedback: Many experienced C10 owners suggest that the need for trimming varies based on the specific setup of each truck. It’s always beneficial to consult with others who have performed similar modifications. Conclusion While some setups of 15-inch wheels on dropped C10 trucks may require trimming the lower control arm for proper fitment, there are ways to potentially avoid this. Careful selection of wheel size and backspacing, as well as consulting with the community, can provide solutions that maintain the structural integrity of your vehicle. Before proceeding with any modifications, weigh the pros and cons, and consider seeking professional advice to ensure safety and performance. Are wheel spacers a viable solution for fitting 15-inch wheels on a dropped C10 truck? Absolutely, wheel spacers can indeed be a viable solution for fitting 15-inch wheels on a dropped C10 truck. Let’s delve into the considerations and steps involved. Benefits of Using Wheel Spacers Increased Clearance: A common issue with fitting smaller wheels like 15-inchers is that they might not clear the suspension components or brakes. Using a 1/4-inch spacer can provide the necessary clearance. Wider Stance: Adding spacers can give your truck a more aggressive stance by pushing the wheels outwards. This is often aesthetically pleasing and can improve handling. Cost-Effective: Compared to buying a new set of wheels or altering the truck’s suspension, wheel spacers are a relatively inexpensive solution. Considerations Spacer Size: While 1/4-inch spacers are a common choice, it’s essential to measure the exact gap needed to ensure a perfect fit. Material Quality: Opt for high-quality, durable spacers made from aircraft-grade aluminum or similar materials. Brands like Eibach and H&R offer reliable products. Additional Modifications: In some cases, minor grinding of certain components might still be necessary to ensure a perfect fit and avoid any rubbing issues. Steps to Install Wheel Spacers Measure the Gap: Before purchasing spacers, measure the exact clearance needed between the wheel and the suspension/brakes. Purchase High-Quality Spacers: Choose spacers from reputable brands to ensure durability and safety. Install the Spacers: Jack up the truck and remove the wheels. Place the spacers onto the wheel hub. Reattach the wheels, ensuring all bolts are tightened to the manufacturer’s specifications. Test for Clearance: After installation, check for any rubbing or clearance issues. You might need to make minor adjustments or shaving to resolve any remaining issues. Conclusion Wheel spacers are a practical and cost-effective solution for fitting 15-inch wheels on a dropped C10 truck. By choosing the right size and quality, and possibly making minor adjustments, you can achieve the desired fit and enhance both the look and performance of your truck. Are 17-inch wheels a good alternative for avoiding trimming the lower control arm on a dropped C10 truck? Yes, 17-inch wheels can be an effective alternative to prevent trimming the lower control arm on a dropped C10 truck. However, it’s crucial to get the right specifications to ensure proper fitment and functionality. Key Factors to Consider: Offset and Backspacing: For a 15×8 wheel, a backspacing of 4 inches typically works well up front. When opting for 17×8 wheels, a backspacing of 4.5 inches is generally recommended. If you face any clearance issues with 17×8 wheels, consider a slightly narrower option, like a 17×7 wheel with 3.75 inches backspacing. Wheel Width: An 8-inch width is quite common for wheels, but depending on the overall setup of your dropped C10 truck, reducing the width to 7 inches might provide better clearance and avoid interference with the lower control arm. Suspension and Drop: The specifics of your truck’s suspension drop will also impact wheel fitment. Ensure you measure the current setup accurately to select wheels that align with your suspension modifications. Steps for a Seamless Fitment: Measure Clearance: Before choosing the wheels, measure the existing clearance between the control arm and the inner wheel. This helps in determining the required backspacing. Evaluate Other Hardware: Consider any other adjustments made to your truck’s suspension or body, as they can influence the wheel fitment. Test Fit Wheels: If possible, test fit the wheels before making a final purchase to ensure they clear the lower control arm without the need for trimming. By carefully selecting the wheel size and backspacing, you can avoid the need for additional modifications and ensure your truck maintains optimal performance and appearance. What are the experiences of other C10 owners with different drop spindles and wheel setups? Experiences of C10 Owners with Different Drop Spindles and Wheel Setups If you’re looking into drop spindles and wheel combinations for your C10, several owners have shared their insights that might help guide your decision. Adjusting for Control Arm Clearance One owner mentioned that they haven’t gotten too far into their project yet, but they’re not opposed to modifying the control arm if needed. They intend to use stock steel wheels, understanding that tire size will be somewhat limited due to this choice. This shows a flexible approach, ready to adapt as necessary. Rim and Spindle Compatibility Another owner discovered that certain dropped spindles may cause the lower control arm to hit a 15×8 wheel’s rim, depending on the wheel’s backspacing. This individual found that some spindles could create a clearance issue, while others had no such problem. Specifically, using a different set of drop spindles provided a better fit, offering at least 1/4″ of clearance with their 15×8 Rally wheels. They also praised the quality of the components they used, noting the excellent casting and machine work. Combining Drop Spindles and New Wheels A different owner just ordered all their lowering components, including 2.5″ drop spindles, and paired them with a set of wheels featuring 3.75″ backspacing for both front and rear. The front wheels measure 7 inches, and the rear wheels 8 inches. They plan to update their findings post-installation, providing valuable information for those considering similar setups. This indicates that even with specific wheel dimensions and backspacing, success may vary, and adjustments might be needed. In summary, C10 owners have found that while drop spindles can significantly enhance the appearance and stance of their trucks, compatibility with wheel setups requires careful consideration. Some modifications or part swaps may be necessary to achieve the desired fit and performance. Is grinding on the lower control arm a safe modification for wheel clearance? Modifying your vehicle to fit larger wheels can be exciting, but it’s essential to weigh the safety aspects of these changes. One commonly discussed method is grinding the lower control arm to create more clearance. Is this a safe practice? Considerations for Grinding the Lower Control Arm Structural Integrity: The lower control arm is a critical component of your suspension system. Grinding it could weaken its structural integrity, potentially leading to failure under stress. Safety Risks: A weakened control arm can cause unpredictable handling or even complete failure while driving, which poses a significant safety risk. Professional Assessment: Before making any modifications, it’s wise to consult with a professional mechanic. They can evaluate whether grinding the control arm is feasible without compromising the vehicle’s safety. Alternative Solutions Rather than grinding the control arm, consider these safer alternatives: Use Wheel Spacers: These can provide the additional clearance needed without altering your vehicle’s suspension components. Adjustable Control Arms: Some aftermarket companies offer adjustable control arms. These can help you achieve the desired clearance while maintaining structural integrity. Different Wheel Offset: Opt for wheels with a different offset that naturally provide the clearance you need. Verdict While grinding the lower control arm can technically create the clearance needed for larger wheels, it’s not recommended due to the significant safety risks involved. Exploring alternative solutions that maintain the structural integrity of your vehicle is a much safer and more reliable approach. What is the impact of rotor thickness on control arm clearance with drop spindles? How Rotor Thickness Affects Control Arm Clearance with Drop Spindles Understanding Rotor Thickness Rotor thickness plays a crucial role in a vehicle’s braking performance and overall suspension dynamics. Typically, rotors come in varying thicknesses, such as 1 inch and 1.25 inches. But how do these differences in thickness impact control arm clearance, particularly when using drop spindles? Impact on Control Arm Clearance When opting for thicker rotors (e.g., 1.25 inches), you may experience reduced clearance between the control arm and the spindle. This reduction can potentially cause interference, leading to wear or contact issues. Thinner rotors (such as 1 inch) offer more clearance, which can help avoid these problems. However, the choice between the two isn’t merely about clearance. Considerations for Drop Spindles Drop spindles are designed to lower the vehicle without altering the suspension geometry drastically. When selecting drop spindles and pairing them with rotors, it’s essential to: Check Compatibility: Ensure the spindles are compatible with the rotor thickness you’re choosing. Measure Twice, Install Once: Accurately measure the current control arm clearance and determine how different rotor thicknesses might affect it. Consult Experts: Sometimes, seeking advice from a suspension expert can provide insights specific to your vehicle make and model. Practical Steps Evaluate: Measure your current rotor thickness and analyze the existing control arm clearance. Research: Look into spindle options that accommodate different rotor thicknesses. Install Carefully: When installing, pay close attention to any clearance issues that arise and adjust accordingly. By understanding the relationship between rotor thickness and control arm clearance, you can make an informed decision that ensures optimal vehicle performance and safety. What are the potential issues with using McGaughy’s drop spindles on a C10 truck? Potential Issues with Using Drop Spindles on a C10 Truck When considering drop spindles for a C10 truck, it’s important to be aware of potential compatibility issues, particularly with certain wheel sizes and configurations. Rim Interference with Control Arms One common problem that arises with the installation of drop spindles is interference between the lower control arm and the wheel. This issue is often dependent on the wheel’s size and backspacing. For instance, if you’re using a 15×8 wheel, the lower control arm may come into contact with the rim, especially if the backspacing is not ideal. Limited Wheel Compatibility Another key concern is wheel clearance. Drop spindles can affect how various wheels fit and perform on your truck. It’s crucial to ensure that the drop spindles you choose will provide adequate clearance for your specific wheels. Some users have found that certain brands of drop spindles offer better clearance than others. For example, while one brand might cause a 15×8 wheel to hit the control arm, another brand’s spindles may provide a more comfortable fit, clearing the wheels by a margin. Verified Confirmation from Manufacturers It’s always a good idea to seek confirmation from the manufacturers regarding the compatibility of their products with your specific wheel setup. Manufacturer support can offer critical insights and sometimes alternative solutions that can prevent potential issues. Recap Rim Interference: Risk of control arm hitting the rim, depending on wheel size/backspacing. Wheel Compatibility: Some spindles provide better clearance than others. Manufacturer Advice: Always check with the manufacturer for compatibility assurances. By keeping these factors in mind, you can make a more informed decision and avoid common pitfalls associated with drop spindle installations on a C10 truck. How do Western Chassis drop spindles compare to McGaughy’s drop spindles for wheel clearance? Understanding Wheel Clearance: Western Chassis vs. McGaughy Drop Spindles When it comes to choosing drop spindles for optimal wheel clearance, Western Chassis and McGaughy offer distinct differences worth noting. Wheel Clearance Issues with McGaughy Drop Spindles McGaughy drop spindles are known to present clearance issues, particularly with 15×8 wheels. The lower control arm tends to hit the rim, which can be problematic depending on the wheel’s backspacing. This design limitation can necessitate additional modifications or adjustments to avoid potential interference. Advantages of Western Chassis Drop Spindles Conversely, Western Chassis drop spindles provide a more generous clearance. These spindles allow for at least a 1/4″ clearance with 15×8 Rally wheels, giving you peace of mind and reducing the need for significant alterations. Notably, the quality of the casting and machining in Western Chassis products is often praised, ensuring both a reliable fit and durable performance. Key Differences McGaughy Drop Spindles: Potential lower control arm to rim interference with 15×8 wheels. Western Chassis Drop Spindles: Provide better clearance with 15×8 wheels, requiring less customization. Conclusion Choosing the right drop spindle can significantly impact your vehicle’s performance and ease of installation. For hassle-free wheel clearance, Western Chassis drop spindles outperform McGaughy’s, especially for those using 15×8 wheels.