Steve@RSD

I am planning on changing my AutoX wheels and tires out to run 18 X 10.5 c5Z06 rears all the way around with 305/30/18 Kuhmo V710. anyone ever have this combo?
Is there any clearence issues? Will I need a spacer on front?

My current Repro Chrome Z06 in stock sizes are heavy and I want a little more front bite.

Steve

WBHighwind

I run 17x11 on all four corners and only have rubbing issues at full lock so I wouldn't see a problem with this. I think Ive actually run these sizes once at an AX with azenis and that was on 4 Z06 rears.

Charles Gerughty

Hi Steve - I run 18" by 10.5" with 305 R888's all around on my C6 and never have had any rubbing issues.

Merry Christmas - Chuck

tstar

Good to hear, that's the exact same setup I'm going to!

Steve@RSD

Thanks Chuck,
Will you be bringing the family out to Auto X again this year? I hope to see you more. Glad to hear you have a new engine, is it broke in now?

Merry Christmas to you as well

Steve

Wah

I did on my '03. For tires, I ran 315/30/18 PZero Corsa.

grantar2

Why would you run 305's when you can run 315s?

sebdavid

You guys know if this would work on a C5 Z06 with T1 suspension? Stock rears at all 4 corners?

Charles Gerughty

Yes I am. The new engine has about 1500 miles on it and is ready for the strip, autocross and HPDE's. Actually put down a first day pass of 11.18 @ 126 mph. Tacking it to the test and tune at Infineon on January 17th to dial it in. Hoping for low 11's.

waddisme

305/35/18 R888s all the way around with no rubbing during VIR and RD ATL track days. Curiously, it did not trip any "ABS" issues when I drove it to work.

BERETTA

I have been running 18X10.5 C5ZO6 wheels all around with Hoosier R6 315/30/18's with no problems on road courses, Just have to be careful no to go to full lock in the paddock this will rub in the front slightly on the drm brake ducts. My car is on LG coilovers.

Steve@RSD

Because Kuhmos V710 does not come in 315/30/18. They only have a 315/35/18.

I am not a fan of A6's because of their wear issues.

Thanks

RAREBLU1

I've been runnin v710 315/35/18 on stock rear Z06 all way around. The only clearence issues I had was the brake ducks. I just removed them, not needed much in Autox. I'm lowered some but not all the way on stock bolts.

RDnomorecobra

For me, just availability and price.

JRitt@essex

I used to run 305/18 Hoosier VRL's on 18x10.5 Enkei wheels at all four corners...(those wheels were almost the identical offset as OEM rears). I never had any fender issues with the car lowered about 5mm on stock bolts. At full lock in the pits they inside of the tire would just kiss the brake ducts. It was more or less maxed out perfect fit.

Miraculix

I have no personal experience from this but from what I've heard you're supposed to keep the rear slightly wider than the front. 285 front / 315 rear is what I've been told. My plan is to go with 10,5" wheels all around but keep the tires as mentioned above. Can anyone tell me why I shouldn't go with 315 all around? Too much grip from the front of the car will make it oversteer, correct?

GCMan

I didn't need to know this about running 315's all around. I hate having to be honest in "SuperStock" class. I will surely test this setup with the porsche club and non point events. I just recently bought a second set of speedlines to get better use out of my A6's so I now have a full set of 18's to go all the way around. If only I could put real seats in my 03 and do this mod and remain in SS class...

FYI, you can really help over steer with a bunch of rear toe in , I'm at 1/2 " total and it really helped keep the back in control.

0Superman09

Can someone please post up a picture of their car on 18x10.5 C5 Z06 wheels on all 4's? I am looking for a side view to see where the wheel/tire sits in line with the fender, obviously mainly concerned with up front. If you could do this I'd much appreciate it! Thanks!

Steve@RSD

There are so many factors to get your oversteer/understeer to the point where you like it. I know my car currently has push in the front before any other traction issues. So i am going to widen the fronts so that I have more grip up front. My car has a Maggie with intercooler and many other things that make the front heavier than stock. I run a stiffer front spring rate and keep the shock valved pretty tight for lean and dive.
If I get to an oversteer condition I have the torque to correct it. I was going 305's all the way around to get more front bite and so I could rotate and maybe make the Khumo's last longer.

I may create a condition that I will have to correct later, but I will not give up my blower!!!


Steve

drivinhard

no wheel spacers, 295 Hoosiers, -3.0 camber

no wheel spacers, -2.6 degree of camber 285/18 Nitto