Bolt pattern conversion adapter (Lug centric) This spacer set includes open end lug nuts to secure the spacers onto your factory hubs Your Factory wheel studs may extend past the surface of the wheel spacers. In this case you will need to:

1.Shorten the factory studs

2.The wheels need to have the open slots (cavities) between mounting holes.

3.Purchase a set of shorter studs and replace them with the factory studs.

Warning:

The included lug nuts extend past the face of the spacers.

IT IS REQUIRED that the back of your wheels have small cavities (at least 2" width and 1/4" deep) in the mounting pad for installation of these spacers.

These cavities are NEEDED so that the lug nuts and wheel studs can sit in this pocket. Verify this before purchasing.

How to choose the correct wheel spacers：

STEP. Check 3 specifications
The following is the easy and simple way to check the bolt pattern/PCD, center/hub bore and thread pitch. If you donot sure, please just message us with the year, make and model of vehicle

1). Check Vehicle Bolt Pattern/PCD For 4-lug, 6-lug, 8-lug, measure the segment from the CENTER of a bolt hole TO the CENTER of another hole.
5 lug is different, you need to measure the back of the hole to the center of the second bolt hole (not center point). 
2). Check Vehicle Hub/Center Bore Size Measure the diam of the center bore on hub, make sure the spacer's diam is equal to or bigger than the axle diameter.
3). Check Vehicle Thread Pitch There are different types of studs, such as M12x1.25, M14x1.5, M12x1.5, 1/2"x20, 9/16"x18, please make sure the studs of wheel spacers is the same as the vehicle's, otherwise the spacer will not fit.