goofygrin

iTrader: (5)

Isn't the stock wheel 8.5"?

I'm just trying to sort out my options. I need to continue to run 245 wide tires for SCCA, so I don't need more metal for more rubber, so why would I go 9", 9.5", or 10"?

Wider wheels will likely be heavier, right?

Thanks!

stryfetew

iTrader: (10)

Stock is 8" wide, I run an 8.5 on mine without any problems.

ZEUS EVOX

iTrader: (3)

I thought stock was 8.5" too!?!?!?!

Rguy

iTrader: (6)

Stock is 8.5"

08EvoXGSR

+1 at 8.5...and wider wheels are not always heavier. I have a set of 9.5's that with rubber weight less then stock....more rubber can never really hurt. Check Ben Graham or Blacktrack-they both run NASA TT and run pretty great set ups.

bli8

What type of SCCA racing do you do? I thought you need to run stock width, can't change offset by more than 1/4" that's all in all stock classes for SoloII (autox). But then again 245 is the max. the tire manufacturers recommend for 8.5" rims. But what you can do is look for those 245mm tires that are wider than others - Hoosier A6/R6 are the first that come to mind. The 225 A6 on my Lotus is just as wide as the 245 Kumho V700

4g63smokinall4s

iTrader: (64)

wait so stock is 8.5 correct?

EvoG8r

iTrader: (31)

8.5 is stock for Evo X.

I think the OP was confused as to which forum he is posting in. 8 inch is standard for CT9A Evos.

goofygrin

iTrader: (5)

I said 8.5" It was someone below me that said 8"

For autocross, in the STU class, AWD vehicles can run a max of 245 wide tires. And the Dunlop Star Specs basically rule the roost for AutoX tires.

Robevo RS

iTrader: (16)

if you are maxed out for 245, then i would get a 9 wide rims and try to strech the tires little bit more

EvoXstylin

iTrader: (2)

I say 9.5 is the best bang for the buck with stock tires. It's what I have.

Hiboost

iTrader: (9)

Well the Kumho 245/40 ZR18 tires have a Rim Width Range of 8.0"- 9.5" but the measured rim width is 8.5" where the tire isn't being forced to go narrower or wider than it's natural mold on a wheel. Usually going slightly narrower on the wheel size will make the sidewall less rigid where as slightly wider would make it more rigid, but 9.5" might make it look like they are barely fitting the wheels and stretch the sidewalls inward a bit too much.

This may depend on the brand since the section width is 9.9" on that particular tire. I know that the wheel widths are measured inside edge to inside edge where the tire is seated, so the outer edge to outer edge on a 9.5" wheel would be 10.5" and be wider than the section width. This is assuming the lip is .5" on each side which seems to be what I've seen on most wheels I measured.

Hope that helps.

Robevo RS

iTrader: (16)

9.5 is little to wide for the 245's no?

DarksideEng

iTrader: (38)

You could do an 8.5" or a 9" with a really low offset to increase track width.

goofygrin

iTrader: (5)

Logan, how does that impact wheel bearing life, since doesn't that stress the bearings more?

I'm glad you're in the tread since you have some of the hottest wheels