RockTrix for Precision European - 4pc 2.0" Thick Wheel Spacers - 8x180 Bolt Pattern, 14x1.5 Studs - for Chevy Chevrolet Silverado 2500 3500 HD, GMC Sierra 2500 3500 HD Heavy Duty (2" inch) [FITMENT] Vehicle Must Have 14x1.5 (Fine) Wheel Studs. 2011-2014 Chevy Silverado 2500 HD & 3500HD. 2011-2014 GMC Sierra 2500 HD & 3500 HD. [IMPORTANT FITMENT INFORMATION] 1) Measure wheel gap for clearance. You will need at least 2.0" (50mm) of fender clearance to prevent the wheel/tire from hitting the fenderliner. 2) Measure your vehicle's wheel studs. It must be less than 2.0" (50mm). 3) Check the thread size of your vehicle's wheel studs. It must be 14x1.5. [SPECIFICATIONS] Set of 4. 2.0" (50mm) Thickness | 8x180 Bolt Pattern | 130mm Hub Bore | 14x1.5 Threaded Studs/Nuts [MANUFACTURING] CNC Machined to exact specifications from Aerospace Billet Aluminum. Undergoes anodizing process to prevent corrision. Includes pre-installed heat treated 10.9 grade studs. [PRODUCT BENEFITS] Gives your vehicle a more aggressive stance. Improves handling characteristics and stability. Fixes brake caliper clearance issues. Increases tire clearance to allow installation of wider wheels and tires.