They come with instructions stating they are not for factory drives only aftermarket use. I think what they mean is that they only fit aluminum rims and not plain steel rims. They fit perfectly on the 1997 factory Cobra rims and the threads go all the way to the rotor so I'm sure they will hold my spare tire should the need arise. The eyelet tool comes in two different sizes so you can use a 19mm or 21mm socket for more compatibility. These may be the best/cheapest cleats on the market.