'will this tire fit?' thread: sidewall height edition.

**justinmc978** · 10-09-2011, 06:02 PM

the popular setup for staggered wheels is obviously 40-r17 front and 35-r18 rear,

would 40-r17 and 40-r18 work? would 40-r18 even fit comfortably? the object is an ever-so-slightly more aggressive stance, comments? would this reduce performance in the turns? any other ideas for reasons I shouldn't do this?

**cammed goat** · 10-09-2011, 06:07 PM

40r-18 would most likely rub and, I am inclined to say, trip the ABS/TC light as the rotational mass of the rear tires will be slower than the front. I could be wrong though. But I DO know the rears will be too tall for the fenderwells. You could try to raise the rear with air shocks to clear the tires. Are said rear tires wider than the front?

**justinmc978** · 10-09-2011, 06:18 PM

Originally Posted by cammed goat

Are said rear tires wider than the front?

havent purchased anything yet, but the set of rims will likely be standard fare 9.5f/10.5r and 275 all the way around, maybe 255 in the front.

according to a tire calculator, there is a 1.09" difference between 35r18 and 40r18 and about 33 less revs per mile.

**cammed goat** · 10-09-2011, 06:26 PM

I have this gut feeling those 275s in 40 spec will rub.

**justinmc978** · 10-09-2011, 06:33 PM

BFH mod can't solve this problem either eh?

according to this calculator, 275r17s are almost an inch wider than 245r17s? how is that?

**cammed goat** · 10-09-2011, 07:41 PM

Probably based on the brand of tire. Some tires have tread/compound designs that are either wider/narrower than what they read on the sidewall. For instance, my rear Nittos are actually narrower than my old BFG G-Force sports. And they are 275-35-18. I held the Nittos next to the old BFGs when I had them dismounted and the BFGs were half an inch wider.

**tatertot91** · 10-09-2011, 09:01 PM

Originally Posted by justinmc978

according to this calculator, 275r17s are almost an inch wider than 245r17s? how is that?

30mm converts to just over an inch. Like Rich said, tire brand also plays a role in how wide the tires will run

275s will look small on that rim, it will look odd imo. Keep in mind that your speedo and odometer will be off and you risk abs issues.

**Spikito** · 10-09-2011, 10:15 PM

i have factory size on the front...245/70 i think?

and 295/35 on the back...which i think is close to the same OAD as a 275/40

**Spikito** · 10-09-2011, 10:15 PM

on a 10.5 rim, and i rub a little bit....1/4" spacer fixed that

**justinmc978** · 10-10-2011, 06:31 AM

so if I went for 9.5" I'll be better off then? (at least compared to 10.5) I dont need anything wider than 275 so..

as far as the actual sidewall diameter, I dont feel like playing around with abs, thats my big concern at this point.. guess I'll just go 17s all around, get new springs to get the stance I want

**2001camaroSS** · 10-10-2011, 07:03 AM

Originally Posted by justinmc978

so if I went for 9.5" I'll be better off then? (at least compared to 10.5) I dont need anything wider than 275 so..

as far as the actual sidewall diameter, I dont feel like playing around with abs, thats my big concern at this point.. guess I'll just go 17s all around, get new springs to get the stance I want

It all really depends on the offset. I'm running 18x11 with 315s in the rear and made no modifications whatsoever (Stranos). Ran 18x10.5s with 295s and rubbed a bit (before adj. pan hard bar and with eibach prokit)

**tpilews** · 10-10-2011, 07:12 AM

Originally Posted by justinmc978

so if I went for 9.5" I'll be better off then? (at least compared to 10.5) I dont need anything wider than 275 so..

as far as the actual sidewall diameter, I dont feel like playing around with abs, thats my big concern at this point.. guess I'll just go 17s all around, get new springs to get the stance I want

I'm running 18x9.5" up front with 275/35. Running 18x10.5" with 295/35 in the rear.