RockTrix for Precision European - (4) 2.5" Thick Wheel Spacers - 8x6.5 to 8x6.5 Bolt Pattern with 9/16" Studs - for 1980-1987 Ford F250 F350, 1994-2010 Dodge Ram 2500 3500 (8x165.1) [FITMENT] Vehicle Must Have 9/16" Thread Wheel Studs. 1980-1998 Ford F250 & F350. 1994-2010 Dodge Ram 2500 & 3500. [IMPORTANT FITMENT INFORMATION] 1) Measure wheel gap for clearance. You will need at least 2.5" (64mm) of fender clearance to prevent the wheel/tire from hitting the fenderliner. 2) Measure your vehicle's wheel studs. It must be less than 2.5" (64mm). 3) Check the thread size of your vehicle's wheel studs. It must be 9/16"x18. [SPECIFICATIONS] Set of 4. 2.5" (64mm) Thickness | 8x6.5" (8x165.1) Bolt Pattern | 125mm Hub Bore | 9/16"x18 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.