Fits well on 1997 Honda CRV but with 15mm you will need to grind down the original 1/2" studs or they will hit the wheel and prevent chipping full dressing. If you have closed end nuts you will then need to grind down the adapter studs. Open ending, all right. In general, they are in place, it's still safe, and I've achieved the look I want. If you go with 20mm, you don't have to do the above work.