nikkev

Right now I have 285/35/18's (9.5" wheel) in the rear and 245/45/17's (8.5" wheel) in the front. Right now, the front sidewall is a lot higher than the rear. It was so noticeable, the wife even said something about it.I want to keep the 285's in the rear, what size on the front will match sidewall height? Thanks!

ritz

iTrader: (1)

Most likely a 245/40/17.

295/35/18 and 275/40/17's match pretty well and 275/40/17 and 245/45/17 have the same size sidewall. So if you have 285/35's you need to go with 245/40's.

Eugenio_SS

iTrader: (2)

275/35-18 and 245/45-17
Plus, they will fit well on the wheel sizes you have.

DaddySS

The math says: 285*35% = 99.75mm
245*45% = 110.25mm

so 245* 40% = 98mm very close

ritz

iTrader: (1)

Yep.

nikkev

Thanks guys! Just what I was looking for!

Eugenio_SS

iTrader: (2)

but the front ones are 17 and rear ones are 18... you need to look at overall diameter.

nikkev

Overall diameter didn't matter to me. What matters is that the front rubber was noticeably thicker than the rear rubber between the rim and the fender.

00firebird

iTrader: (3)

i dont see why that matters, overall height is more important for driving

02Z06man

245/40/17...that sounds about right to me

Eugenio_SS

iTrader: (2)

if that is the case,
get 245/45-17 and 275/40-18
I would think it's dumm to have a 17/18 combo if you care of the sidewall height and not overall diameter... just get same wheel size on all corners.

Tiger2o69

iTrader: (16)

get 245/45-17 and 275/40-18


I have those those and they are not the same size... My abs doesnt work..

So im going to try 245/50/17's..
http://www.miata.net/garage/tirecalc.html

Xsta Z 28

iTrader: (2)

Well when your ABS fails, it will matter . . . .

alan2000T/A

iTrader: (23)

Come on guys, I see where he's coming from.

Example: Z06 Vette wheel/tire combo is 265-40-17 Front; and 295/35-18 -rear that makes the aspect ratio/profile the same.

You know GM didn't design the Z06 to have different sidewall heights, but in order to accomodate that design, the overall diameter for the rear tire is taller.

Xsta Z 28

iTrader: (2)

Right. The Corvette is DESIGNED for different overall diameter tires, a Camaro is not, so the excessive OD difference will confuse the ABS computer in a Camaro and cause the brakes to fail in a panic situation . . .

markl67

Exactly, you can't just compare sidewall profile if you're running different size rims (17 vs. 18). Check out the "does this fit thread" - there's a couple calculators where you can compare tire diameters.

ritz

iTrader: (1)

Well for the record I ran 17x9.5 and 18x10.5 with 275/40/17's and 295/35/18's with no problem on my TA.

ta12sec

iTrader: (3)

Smaller tries on the front will make the abs think the front tires are locking al release the front brakes......You want to guess I how know that .................

ritz

iTrader: (1)

I don't understand. There are plenty of guys running staggered set-up's. As long as the overall diameters are close then nothing will happen with your ABS.

ta12sec

iTrader: (3)

"As long as the overall diameters are close then nothing will happen with your ABS."

close and 1/2 inch diffrence are 2 diffrent things.