Originally Posted by hybridandy
I use 225/40/18 on my factory SpecB rims since I replaced the original tires many many years ago and haven't had a problem. Speedo seems to read normal (usually 1-2 mph faster than the Your Speed Is "" around construction sites) and I haven't broken the rims yet (180k miles). For whatever reason, the tires are usually $15-$20 less per tire too.
Thanks! I figured I'd be good. Yeah $169 for the 40's vs 216 for the 45's...
They don't make 225/40/17's though, had to get 45's for the GT.
I did bend a rim and slash a tire on my GT. Though I popped up on the corner of a curb turning a corner and caught just the edge, tire/rim slipped down the curb and slashed the tire.