The Wheel spacers allows extra clearance between the wheel and the wheel hub assembly increasing the offset which allows for larger tire installation to the vehicle. Wheel spacers also increase vehicle's performance in terms of handling and traction. The further the wheel is from the hub assembly, the better its grip. Wheel spacers extend the wheels outward the vehicle giving it a more aggressive look, which also allows for large brake caliper installations or lift/lowering kits. The wheel spacers are 1.5 inch thick with 77.8mm center bore diameter, 9/16-18 threaded studs and a 5x139.7mm bolt pattern. Compatible with the Following: 2002 - 2011 Ram 1500, 2006 - 2009 Aspen, 2005 - 2011 Dakota, 2004-2009 Durango This is a compatible replacement part manufactured by AA Ignition. This wheel spacer kit is NOT a genuine OEM part. Vehicle makes and their associated vehicle models and part numbers are used in this listing only to identify the vehicles this wheel spacer kit fits.