Brand KAX Thickness 2" PCD(Bolt Pattern) 8x6.5" to 8x180mm Thread Size M14x1.5 Center Bore 126.15mm Quantity 4Pcs Specification - Bolt pattern: 8x6.5" to 8x180mm; Hub Bore: 126.15mm;Thickness:2";Thread Pitch: M14x1.5. Fitment-Our wheel spacer set fit for Silverado 3500,Yukon XL 2500,Suburban 2500,Silverado 3500 HD,Silverado 2500 HD Benefits-Wheel spacers create extra space between the tire and the wheel hub, thus preventing the wheel and tire from rubbing against the pads, brakes, or other suspension components, as well as being a great solution for complex and expensive staggered/negative offset wheel setups, making your vehicle stronger and more stable, allowing for the installation of lift kits, larger calipers, or traction tires. Installation-If you are a skilled mechanic and have used the correct spacers then installation is very easy, however, we don't want to over emphasize how easy or useful the installation is or how much time and money it will save you, please read the instructions first and make sure the fitment is right, we recommend you use a professional to do the installation. KAX Wheel Spacers & Adapters Specification 8x6.5" to 8x180mm2"126.15mm M14x1.5 KAX Wheel Spacers / Adapters Give your vehicle a wider stanceProvide a better drving experienceAllows installation of wider wheels & tiresProve more room for your wheels drive more stablyIncrease Tire clearance can help tremendously with clearance and rubbing issuesCNC Machined The Wheel Spacers are CNC machined to a precise standard to make the installation fit more better, so as to prevent wheel vibration and maintain the stock driving.6061-T6 Aluminum alloy KAX Wheel Spacers are forged from anodized black 6061-T6 Aluminum alloy, making them more durable and corrosion resistant. Anodized Surface Each of products are anodised during production to protect against the elements, advanced surface with oxidation treatment durable color and won't fade easily Note: 1. Installation by a professional technician is highly recommended. 2. Avoid using an impact wrench; hand wrench is recommended. Improper usage may cause lug nuts/bolts to break or loosen while driving, which will take potentially accident or injury. Be sure to torque the lug nuts to manufacturer specifications. 3. Clean the surface where the wheel spacer will be mounted. Then, clean the back of the wheel as well. When applicable to your specific vehicle application, remove the rotor/drum retainer clips. Be sure to remove all rust and corrosion with a wire brush. All surfaces must be clean so the wheel spacer sits perfectly flat on the vehicle mounting surface. If the surface is not clean, wheel vibration will occur. 4. Re-torque all lug nuts after 50-100 miles of driving, then again after 2-3,000 miles. Tip: Ensuring that all mating surfaces are properly cleaned before re-torquing.