Bo2point0

I was wondering how wide of a tire I can get for my stock rims.

Sport sedan 6mt OEM rims (dimensions in inches)
front: 18x7.5
Rear: 18x8.5

I was thinking 245-45-r18 up front
and 265-40-r18 in rear

Will these wide tires fit the stock rim dimensions or do I have to go skinnier?

Thanks.

simonsez

I think they are too wide...
you should stick with 225 front / 245 rear

equetefue

iTrader: (2)

I agree with above statement. If look at your setup now the tire is already an 1/8' of an inch over the lip of the oem wheel

MACS

iTrader: (3)

Why not go aftermarket rims if you want wider tires? If you like the staggered setup, try 10.5 rear and 9 front.

Bo2point0

My bro has a rear tire of

255-45-r18
on
18x8.5

I was thinking i would get something slightly wider but the consensus seems to be the otherway

I actually like the stock rims, but I feel the tires are not aggressive enough.

antirice

iTrader: (2)

I am sure 235 front 255 back is fine. I think some members here have that setup.

pricojorge

iTrader: (3)

Go 255 in the back, .... just look at the prices for 265 (if you even find them)

Id stay 225 in the front but if you really want to just do 1 more up 235.

soundmike

iTrader: (6)

Agreed. Nothing wrong with this set-up, and they're still within spec in terms of speedo accuracy as well as tire manufacturer tire:rim width ranges.

simonsez

I agree with MACS. go for aftermarket rims if you want a wider tires.
i'm running 245 on 9inch wide front, 285 on 10.5 inch wide rear pix coming soooon.

dkmura

The problem with mounting tires that are larger than the recommended width of the wheel is that it stretches and distorts the contact patch of the tire. Can you put a wider tire (like a 275) on an 8.5" rim? With a lot of work, yes. Should you? No. The resulting tire will have buldging sidewalls and actually less contact with the road than a 245 aspect tire. Don't make your G less performance oriented by trying to stretch a tire.

soundmike

iTrader: (6)

I know of no manufacturer that recommends putting 275's on 8.5" wide wheels. 255's are okay, and i believe 265 really is the maximum recommended width, not taking into account aspect ratios and speedo issues.

The point is, the OP can certainly put a wider tire on their rim and still be within manufacturer's specs.