i rub just before full lock, or at full lock really, but how often are you going to turn and overstress your power steering pump. i haven't had any problems with them so far. like i say...you can't really go by those calculators. they said my tire would be over 27'' tall and it is about 26'' even, maybe a hair over. there's someone on here that said their 255/50's were only 25.5'' .....with a 2/3 drop i like them. they are a pretty wide tire for the front though, a lil more weight with the rims too....but my handling has gotten better regardless.