Hey guys. I just got a nice set of rims for my LS cobalt. they are 17" and came with some decent 205/40/17 tires. The thing is I am pretty sure these tires aren't really close enough to the original size tires that came on the LS and sometimes when I get on the brakes they vibrate which they didnt really do before. (I dont have ABS). So I am wondering what size tires I should put on so that they are good for performance while looking good and matching the original size enough that it wont cause problems with my car. Thanks guys.
-Jeff