Fitting wheels from a different vehicle or automaker can be difficult, if not impossible. Since every automaker has different design theories and goals when developing their vehicles, lug nut sizing and spacing will vary. There are certainly a limited number of configurations out there, still, an E46 wheel will NOT mount onto an E30 chassis without the proper hub/lug comfiguration. Enter the wheel adapter. These mount to your existing hub and then provide the proper hub for the wheel you are trying to mount without the need for custom hubs or complicated swaps.. Want to mount BMW Style 95's on a Lexus LS400? You can, and there is an adapter for that.