Bora 10mm Wheel Spacers for GMC Sierra — Precision-Machined Aluminum
Our 10mm wheel spacers deliver the perfect stance upgrade for your GMC Sierra 1500 without requiring new wheels or offset adjustments. Precision-CNC-machined from 6061-T6 billet aluminum, these hub-centric spacers push your wheels outward exactly 10 millimeters per side for improved track width and aggressive wheel positioning.
We engineer every Bora spacer with OEM-grade tolerances to maintain your Sierra’s factory ride quality and handling characteristics. The 10mm width provides noticeable visual impact while clearing larger brake calipers and accommodating mild lift kits. Each set includes grade 10.9 hardened steel studs pre-installed and torqued to specification, plus installation hardware for bolt-on fitment that takes under an hour in your driveway.
Hub-centric design eliminates vibration by centering on your Sierra’s factory hub bore rather than relying solely on lug nuts. Our black anodized finish resists corrosion from road salt, brake dust, and harsh weather conditions season after season.
- 10mm (0.39 inch) width per spacer for 20mm total track width increase
- 6061-T6 aerospace-grade aluminum CNC-machined to 0.02mm tolerance
- Hub-centric 78.1mm bore matches GMC Sierra 1500 factory hub diameter
- 6×5.5 inch (6×139.7mm) bolt pattern fits 1999-2024 Sierra 1500 models
- Pre-installed grade 10.9 hardened steel studs rated for 3,500 lbs per wheel
Materials & Manufacturing
We machine every Bora wheel spacer from a single billet of 6061-T6 aluminum alloy — the same material used in aircraft structural components and high-performance racing parts. This specific aluminum grade offers an optimal balance of tensile strength (42,000 PSI minimum), corrosion resistance, and lightweight construction that won’t add unnecessary unsprung weight to your Sierra’s suspension.
Our CNC machining process holds tolerances within 0.02 millimeters across all critical surfaces. The hub-centric bore is cut to exactly 78.1mm diameter to match your Sierra 1500’s factory hub, ensuring the spacer centers on the hub itself rather than the wheel studs. This precision eliminates the vibration and wobble common with lug-centric spacers that rely solely on bolt tension for centering.
Fitment & Compatibility
GMC Sierra 1500 Applications
These 10mm spacers fit all GMC Sierra 1500 models from 1999 through 2024 equipped with the 6×5.5 inch bolt pattern and 78.1mm hub bore. This includes base, SLE, SLT, AT4, and Denali trims across regular cab, double cab, and crew cab configurations. The spacers are compatible with both 2WD and 4WD drivetrains.
Our hub-centric design requires your aftermarket wheels to have a center bore of 78.1mm or larger. If your wheels have a larger bore diameter, we recommend using hub-centric rings sized to match your specific wheel bore. The 10mm width works with factory wheel offsets ranging from +18mm to +31mm without causing tire rub on stock suspension heights.
Installation Process
We design our bolt-on spacers for straightforward installation that doesn’t require pressing studs or specialized tools. Each spacer arrives with hardened steel studs already installed and torqued to factory specification, saving you the hassle of stud installation and ensuring proper thread engagement from day one.
Remove your Sierra’s factory wheel and clean the hub face thoroughly to remove brake dust and corrosion. Slide the Bora spacer onto the factory studs and hand-thread the included lug nuts. Torque the lug nuts to 140 ft-lbs in a star pattern using a calibrated torque wrench — this secures the spacer to your hub. Mount your wheel onto the spacer’s extended studs and torque to your wheel manufacturer’s specification, typically 140 ft-lbs for aluminum wheels.
GMC Sierra Wheel Spacers in Other Widths
What people are saying
Common Questions About Bora 10mm Sierra Spacers
Yes, our 10mm wheel spacers fit all GMC Sierra 1500 models from 1999-2024 including the Denali trim. Your Denali uses the same 6×5.5 inch bolt pattern and 78.1mm hub bore as other Sierra 1500 variants. The spacers are compatible with both the standard 20-inch Denali wheels and the optional 22-inch wheels.
Verify your wheel’s center bore diameter before installation. If your aftermarket wheels have a bore larger than 78.1mm, you’ll need hub-centric rings to ensure vibration-free fitment.
Installing 10mm wheel spacers on all four corners increases your total track width by 20 millimeters or approximately 0.79 inches. Each spacer pushes the wheel outward 10mm on its respective corner, so you add 10mm per side.
This width provides noticeable visual impact without the aggressive stance that wider spacers create. The 10mm measurement is ideal for clearing larger brake calipers, accommodating mild lift kits, or achieving flush wheel positioning with stock-offset wheels.
No, you don’t need longer lug nuts because our 10mm spacers come with extended studs already installed. The spacer bolts to your Sierra’s factory studs using the included lug nuts, then your wheels mount to the spacer’s extended studs using your factory lug nuts or the chrome lug nuts we provide.
The extended studs are grade 10.9 hardened steel with proper thread engagement to safely support your Sierra’s weight. We pre-install and torque these studs at our facility so you don’t need to press or install studs yourself.
Yes, our 10mm wheel spacers are engineered to handle the Sierra 1500’s maximum towing capacity when properly installed and maintained. The 6061-T6 aluminum construction and grade 10.9 hardened steel studs are rated for 3,500 pounds per wheel, well above the load requirements for Sierra 1500 towing applications.
We recommend checking lug nut torque before any towing trip and inspecting spacers every 5,000 miles when using your truck for regular towing. Proper installation and maintenance are critical for safe towing performance with any wheel spacer product.
No, 10mm wheel spacers typically don’t cause tire rubbing on stock-height GMC Sierra 1500 trucks with factory wheel sizes. The 10mm width (0.39 inches) is conservative enough to work with stock suspension geometry and factory tire sizes up to 275/65R18.
If you’re running oversized tires, leveling kits, or aftermarket wheels with aggressive offsets, we recommend measuring your current clearance at full steering lock before ordering. Most customers run 10mm spacers successfully with 2-inch leveling kits and 33-inch tires without rubbing issues.
We recommend checking lug nut torque at 50 miles, 500 miles, and 1,000 miles after initial installation. After this break-in period, inspect and re-torque lug nuts every 5,000 miles or with each tire rotation as part of your regular maintenance schedule.
Always torque lug nuts to 140 ft-lbs using a calibrated torque wrench in a star pattern. Check torque when wheels are cold (before driving) for accurate readings. Proper torque maintenance ensures the spacers remain securely mounted to your Sierra’s hubs throughout their service life.
Hub-centric spacers like our Bora 10mm model center on your Sierra’s factory hub bore (78.1mm diameter) rather than relying on lug nut tension for centering. This design eliminates vibration because the hub carries the wheel’s weight and centers it precisely, while the lug nuts simply clamp everything together.
Lug-centric spacers have an oversized center bore and depend entirely on lug nut torque to center the wheel. This approach often causes vibration because slight variations in lug nut torque lead to off-center mounting. We manufacture exclusively hub-centric spacers because they deliver superior performance and vibration-free operation.