tlpvt

stock GT with stock polished aluminum 18" (8.5)
has anybody had any rubbing issues with 275/45R18 all over?
or would 255 width be better?

Leoleo

255 is the widest you should go on 8.5 rims.

http://www.1010tires.com/TireSizeCal...?action=submit

99flhr

^ I just put 275/40 HTR Z II`s on the stock 8.5" wheel
Sumitomo recommends a minimum of a 9" wheel for this tire. Visually I see no difference in sidewall "bulge" between this and the 255/45`s I mounted on the front. Drives fine and has a sharper feel and quicker turn in than the stock BFG`s.
Car has Eibach Prokit springs, no fitment issue

tlpvt

looks like 8.5" is the minimum width for 275's; for example:

http://www.michelinman.com/tires/lux...specifications

whtcanbrwnd04u

i have 275s on a 17x8 for the track

rubah_dmb

does any one have pics of 275's on the 8.5...?

Nuke

I did a search on tirerack for various brands of 275/45/18 tires. Of the 2 tiresthat I sampled, 8.5" was the minimum recommended width.

w1ck3dr1

is there a way you can tell how wide your tire is without taking it off?

moosestang

If you have stock 17's they are 8 inch, if they are stock 18's they are 8.5 inches wide. If you have some aftermarket rims and you aren't sure, you could always put something across the outside and inside lips and stick a tape measure inbetween to measure the width.

Stkjock

275/45 are approved on an 8.5 rim from several companies. the issue as i recall is that they are pricey and found on high end cars for the most part

I went with 265/40 DRs as an alternative