I bought these spacers for my 2013 Scion FR-S. The length of the lugs is longer than factory. The factory nuts can't reach my factory bike unless the top of the nuts are broken. In my case I tightened the nut and found that the round top had come loose due to the studs protruding. (I hope cracked/punctured top lug nuts are still strong enough like open ended nuts.). With these seals it is better to have nuts with an open end.