Boosted & Black

is there going to be rubbing, or will they even fit? 255/50/16, on stock TII rims.

thanks.

ARD T2

iTrader: (22)

honestly, the rubbing shouldn't be your primary concern. You should consider the change in gearing as a result of seriously oversizing your stock size. For a 16" wheel, the max you want to run is a 245/45/16, unless you have changed your gears or final drive gear. You will have a much slower 0 - 30 timeslip, but your trap speed might be higher. As far as whether the total E.T. is lower, I can't hypothesize that. I don't know your setup. Plus you will need to jack the car up with coilovers, because I am sure it would rub at some point, with stock height.

If you want 255's, get 17's or 18's.

Good luck,
Rishie
Auto R & D

suganuma

what the hell does it have to do with wheel diameter??
you're dealing with the width of the wheel
if your wheel is 16x8 or 17x8 or 18x8......the widest tire you should put on there is a 245 width

wheel diameter is going to affect the sidewall length of the tire

i.e. stock fd wheel is 16x8 (maybe yours is different)
stock is 225/55/16
largest to run is 245/45/16
OR....you could go 225/45/18....

get it?
got it?
good

oh and if im just completely off on all of this feel free to correct me......this is just what i personally have been told my whole car learning career....im always welcome to learn more though and relearn things ive learned wrong.....so correct away if necessary

ZoomZoom

iTrader: (2)

Actually you need to go woth a lower profile tire when you go up to larger diameter wheels or your wheel tire combo will be taller. Say you have a 225/50/16 and you want to go to a 18 inch wheel of the same width. First off you need to go with a lower aspect ratio (sidewall height) so you need to shorten the sidewall to retain the same over all hight of the wheel tire combo or as someone metioned the gear ratio will change at the wheels as well as fitment problems. So in my case I am going with a 18 inch wheel from my stock 16 inch wheel so my aspect ratio will go from a 50 series to a 35 series. The width is different the larger the # the wider the tire. The width is represented as the first # in the series of #'s on the tire so the 225 stock is not going to be as wide as the say 255 or 285. Its called Plus sizing. You try to add diameter but lower the Aspect ratio to retain proper fitment and gearing. It wont be exact but it will be within a couple millimeters. Thats close enough, say by about 2 rotations per mile difference.

suganuma

yup....forgot to compensate for that since its a percentage type calculation

basically he said everything i was trying to say but didnt know the terms for or how to explain it......so there ya go

and thanx zoomzoom

maxcooper

This probably won't help the original poster much, but here is a cool tire diameter Applet:

http://www.miata.net/garage/tirecalc.html