Specification: Vehicle bolt pattern = wheel bolt pattern: 5x5.5 (5x139.7mm), hub bore(without lip hub): 108mm, thickness: 1.25 inch , stud/nut thread pitch: 1/2 x20. Recommended torque:75-85 ft/lbs.It is recommended to use professional tools (such as micrometers) for measurement Compatibility : 5x5.5 wheel spacers are compatible with 1975-1996 F-150, 1994-2001 Ram 1500 5.9L 4WD, 1994-2001 Ram 1500 5.2L 4WD, 1994-2001 Ram 1500 5.2L RWD, 1966-1996 Bronco, 1992-2002 E-150 Econoline, 1994-2001 Ram 1500 5.9L RWD, 1953-1983 F-100, 1976-1986 CJ7, 2003-2006 E-150, 1994-2001 Ram 1500 3.9L RWD, 1999-2003 Ram 1500 Van, 2002-2006 XL-7, 1992-2002 E-150 Econoline Club Wagon, 1977-1993 W150, 1959-1983 CJ5, 1989-1997 Sidekick, 1975-1993 Ramcharger, 1990-1993 D150, 2003-2005 E-150 Clu Forging Technology: The KAX 5x5.5 1.25 inch wheel spacers are forged 6061-T6 Aluminum, are more heavy duty, durable and corrosion resistance. And they are specifically designed by in-house engineers and CNC machined to exact standards,ensuring the best fitment possible. Heat treated and hardened 12.9 grade geomet bolts, not easy to break off and strip. It is recommended to use professional tools measure the OEM wheel hubs and bore dimensions. Function : 5x139.7mm 1.25 inch spacers are designed to move the wheel further out from the hub,fixes clearance issues, wheel hitting the brake calipers or shock/struts,fixes wheels that look tucked in the fenders, gives your car an aggressive stance. Please Note : Better to use some glue on the spacers, alignment recommended after installation, re-torque the open-end lug nuts after some 50-100miles. NOTE: Please use the amazon comfirmed fit tool again to verify if it is compatible with your vehicle before purchasing the wheel spacers ASIN B0FHBGBBY5 Brand KAX Model Wheel Spacer Item Weight 14.52 pounds Manufacturer KAX OEM Part Number 5x5.5 -108mm-1/2 x20-31.8mm-4pcs Item model number Wheel Spacer Product Dimensions 7.09 x 7.09 x 3.94 inches Manufacturer Part Number 3992WSA444AUS