Official Enkei RPF1 Thread
#3783
Are 255/40/17 tires taller or larger in diameter (not width), than 245/40/17? i read something here that said yes? if so wouldn't having a 255/40/17 tire affect gearing = slow the car down? Even if the RPF1s are lighter than stock?
#3785
Originally Posted by gabster,Apr 22 2010, 07:39 AM
Are 255/40/17 tires taller or larger in diameter (not width), than 245/40/17? i read something here that said yes? if so wouldn't having a 255/40/17 tire affect gearing = slow the car down? Even if the RPF1s are lighter than stock?
A 9" weighs about 1/2 lb more than a 8", again not enough to worry about. IMO yes it does look much better, mainly because the spoke face is completely different. eg2solsi500 already regrets getting the 8" front.
#3786
Originally Posted by gabster,Apr 22 2010, 10:39 AM
Are 255/40/17 tires taller or larger in diameter (not width), than 245/40/17? i read something here that said yes? if so wouldn't having a 255/40/17 tire affect gearing = slow the car down? Even if the RPF1s are lighter than stock?
255 is the width and 40 is the aspect ratio so the sidewall height for that particular tire is 40% of 255. For a 245/40 the sidewall is 40% of 245. It's always going to be a smaller number and therefore will never been taller.
Maybe you got confused and saw someone mention a 245/45/17. Now that IS a taller tire than a 255/40.