Originally Posted by littlewhitewagon
I have r40 on all my cars. Yes, rust can develop. Cro-moly rusts. Your stock lugs rust too. I do not use the lock version. I don't find a need, wheel locks are easy to take off in seconds. I have used impact on mine, but usually only for taking them off with a 17mm socket. If cost is a factor, kics are not cheap like mcgard. The threads do not go end to end. The engagement area is about the same as a stock lug.
If you had a chance to go back, would you go with mcgards instead? Do you find the engagement still very satisfactory and safe?
and why did you choose these anyway, seeing as they are one of the most expensive lug nuts on the market, what made you take the jump?