Spacer Thickness 1.5 inch or 38 mm Vehicle bolt pattern 5x5 inch or 5x127 mm Wheel bolt pattern5x5 inch or 5x127 mm Thread Size1/2" x 20 Bolt Shack Length 35 mm Torqued Down By Hand At 75-85 FT/LBS Hub Bore 71.5 mm Number of Pieces 4pcs 4Pc 1.5" 5x5 Hub Centric Wheel Spacers For Jeep Grand Cherokee WJ WK Wrangler JK Bolt Shack Length 35 mm Hub Bore 71.5 mm For Jeep Commander XK 2006-2010 For Jeep Grand Cherokee WJ 1999-2004 For Jeep Grand Cherokee WK 2005-2010 For Jeep Wrangler JK 2007-2018 (2018 JL Models will NOT fit) 1. Check Your Vehicle Bolt Pattern/ PCD, Hub Bore Size, Thread Pitch, Vehicle fitment compatibility is only a guide. 2. Measure the fender gap and stock bolt length to choose suitable thickness. ( For 1 inch or less or special adapters, if the stock studs are longer than the adapters, and the wheels do not have hollow spot in them, you may need to grind, or cut your existing lugs if you dont choose to purchase shorter studs. ) 3. PLEASE CONFIRM what you actuall need, wheel spacers or wheel adapters, they are different. Wheel Adapters are used to change bolt patterns in order to properly fit wheels from one vehicle to the hub of a different vehicle. 4. Do not use impact wrench .Please use hand wrench. Recommended to use threadlocker. 5. Returns are only accepted if unused and not installed. (ReturnsARE NOT ACCEPTED IF SPACERS-ADAPTERS HAVE BEEN INSTALLED TO YOUR VEHICLE) What are common problems with wheel spacers? The main issue with a wheel spacer is that it moves the wheel to a wider position whilst the rest of the suspension arms remain in the same place . In particular, the king pin inclination axis remains in the same place. Therefore, fitting a wheel spacer moves the wheel outboard and alters the scrub radius of the car. How do I know if I need wheel spacers? Wheel spacers are used when the offset of the wheel is not ideal for the end package that you want . Whether its because of too narrow of axles or not enough wheel offset, wheel spac