I'm just trying to figure out which sized tyre would be most appropriate for my needs (250rwkw silvia, only occasional drag use so not wanting to spend a great deal). In a cheap semi-slick like the Falken RT215, there's not a great deal of width options available for each diameter so which would be better, a wide 17" tyre or a narrower 15" tyre with greater sidewall flex? Comparing, say, a 255/40/17 ($280) vs 225/50/16 ($190) vs 205/60/15 ($160), and possibly taking into account the price difference between them (ie. is the increase in traction worth the $120 difference. Prices from Tempe Tyres).
Or maybe i should save and get some 255 15" BFGoodrich Comp T/As or Nittos but they'd be significantly more expensive again.
cheers
Neil