racer313g

What is the largest slick that will fit on the front of a c5z without rubbing or causing issues? Car is lowered an inch with a track/street alignment but otherwise stock. Running 18 inch speedlines on all 4 corners. I bolted a 305/660-18 on the front and it looks pretty tight in the wheel well. Currently running a staggered setup but would like to square it up.

RogerT

I could not run 305 x 660 x 18" on lowered front.
I can run 285 X 645 X 18 on lowered front.

Roger T

z06801

No trouble with 305/645/18s they work well for sure, I didn't think that the 305/660/18s rub on track, maybe tight turns in the padock.

waddisme

This is what I am running and they barely rub my DRM ducts. I have seen people with 315s on the front, but 305s are as big as I would go.

db2xpert

Depends on your offsets... and how much you're lowered.

moespeeds

I run 305 660 18 on the front but it's track only. Car has coilovers so it's low, and they rub the DRM ducts if you're not careful. I wouldn't run it on a street car.

clubracer6

Sorry to bring up and old thread, but feel it's best to keep this kind of stuff together!

We currently run Hoosier A6 335-30-18r and 295-30-18 in the front.

Does anyone know the best slick size to go with to keep them somewhat similar? I always wanted to go slightly bigger on the front, was always happy with the rear...although with the big power this year, that might change...

63Corvette

I just want to point out that it is NOT necessary to run the "widest/biggest" REAL slick tire on your C5 Corvette. I run (real cheap) Dunlop scrub slicks in 265 front and 285 rear. They will stick the car to the ceiling when they (eventually) get HOT!
Try some scrubs first, find your sweet spot and then spring for some new slicks if you are rolling in cash. They WILL last longer (and stick better) than R-Comp tires....even Hoosier A6.

clubracer6

thanks, we have some Pirelli scrubs for a test day, but trying to see if someone else has worked out a good size for us to use as starting point. We want to get it right before we start mounting new ones up.

I hear most go away after a few heat cycles. I know most of the WC guys only use their for two or three sessions before selling them. Gorgeous C2 btw!!

JerryTX

305 is a good width, just go with a smaller aspect ratio, 650 or 645. I successfully ran the Pirelli 305/650/18 square on a narrow body C6 race car with lots of grinding on the inner fender liner. I'm going to go wider in the rear next time with a 320 if I can get it.

RDnomorecobra

305-660-18 Conti scrubs here and I did get some rubbing on outer edge from fender.

sebdavid

I've had to raise ride height to avoid rubbing on outer edge of 305-650-18 Conti scrubs in front. T1 suspension. I rub on the brake ducts close to full lock but not an issue for track driving except in paddocks perhaps.

kmagvette

The Continental 305/660x18 is about an inch shorter than the Pirelli of the same dimensions when mounted on 11" wheels. On my C5Z there is no problem with them rubbing ducts unless you crank more than one rotation into the wheel...everything will rub the ducts if you crank the wheel far enough.

I had a set of Pirelli's in 275 (I think...what ever the Grand-Am Mazdas run up front), they stuck nicely but wear across the tread was an issue. With the smaller tire I would have needed more than my -2.5* camber to manage the tire properly.

Both of them rub on the front if you are able to heat them up on a car is moderately lowered. If you are not able to heat the Pirelli's you will hate them, they do slide a lot, with no noise, when cold. When they heat up they are awesome.

clubracer6

This is on a c6 (wide body) that will be very low and will be racing.

I think 275's will be too small...

Thanks for all the input! :-)

Werks

Assuming you have 10.5"+ fronts and 12"+ rears in A6's or R6's for your car most people would run 315/30/18's front and 345/35/18 rears. In slicks there is a little variation in sizes (from brand to brand) but you would want to go with something around 305/650/18 front and 325/680/18 or 325/710/18 rear if you can set your car up properly to run that taller 710 sidewall tire.