On the cobalts the back tires will rub first but how wide can you go on the front until it starts to rub?

 

I believe 245/40, I personally have 225/45/18

 

really damn I wish there was a way to put on some 265's that would be nice.

 

depends on your offset.

with a 38mm offset, you can't go wider than a 26"x9.5" tire.

 

Whats the widest with a 45/18 side wall I'm guessing 235? ???

 

Im running 245/45's and it rubs my intake on the drivers side when i turn real sharp

 

245 45??! jeesus, run a 235 40, or 245/35. yu guys are running monster truck tires.

Run the correct aspect ratio and you won't rub.

 

i have 235/40/R18 never rubbed yet

 

im running 225/45/18r and lowered 1 3/4- 2 " and i dont rub, i wonder is 235/45/18r would be and inssue....ummmm

 

Don't forget 245/40 on +42 offset

 

listen, you guys in other states might be able to run smaller sidewalls but I live it pittsburgh, the land of potholes.

 

235/40/18 is only 0.1" shorter than the oem 215/45/18 and is 0.2" taller than 225/40/18

so 235/40/18 seems to be the best option, i've been running 225/40's for a while now because the tire place here can get a set for me installed for about $350 with a lifetime hazard warranty

 

We ran 225/45 Bridgestone 760 sport tires on ASA J8s (18x7.5). They would rub the inner wheel well on a sharp turn and smacking a bump. The 45 aspect is recommended by tire rack on the ss/sc but it is too tall.

This question has been asked before and I believe there is a lot more rubbing going on than what is admitted to.

 

I put 255/50's on w/ rubbing.

 

i had nitto drag radials on the front. 275/45/17 with sportlines. only rubbed while turning and braking

 

oops i meant 245/40's lol

 

even so, go down to 245/35

 

so im lowered now on 225/45/18R's no rub issues. my fenders are rolled now note. what do you think the biggest size tire would fit keeping the 45wall height on a 18 ???/45/18R just curious?

 

this is on a stock ss sc rim?

 

ive had 245/45/18 on. they were old tires that were worn down, just did it to test...they rubbed the strut...im lowered on sportlines

 

why are you so set on a 45 sidewall?

A 235/40 is as close to the stock overall diameter as you can get.

245/35

265/30

etc... they all have a very similar sidewall height.

It's just a percentage of the tread width.

ex: on a 235/40 tire, the tread is 235mm wide, and the sidewall is 40% of that. Technically speaking.

 

if that was in referance to me... they were not by choice, only because someone was getting rid of them, and simply wanted to see how big the tires could go before it rubbed. 245.45 rubbed slightly...so when i get 245.35's i hopefully would not have any problems

 

I'm just curious I have 225/45/18r now
what's the biggest you can go on 2??/35/18 and 2??/40/18 just would like to know I'm just curious Note 7.5 or 8 wide rim

 

google tire calcualtors...it will help you alot

 

Kool kool I'll check that out. Didn't know there was something like that. Thanks