When you run a fat tire, or an aftermarket shock, often you need just a little more offset to clear the shock. This simple 4 shim kit gets you a total of 4mm. you can run 1,2,3 or 4 shims. These are the exact same inner diameter as your axle. Simply remove your wheel, slide these over your axle, then reinstall. The axle is a non-standard size, so you need to use the correct shims to achieve a proper, balanced fit.
One kit comes with 4 shims.