rabrooks

I have Continental 325/30 19's on the rear of my car. During track events, the tire rubs the forward and top of the inner fender. Is the ZR1 inner fender well larger? If so, I'll buy a pair. If not does anyone sell aftermarket fender wells that are larger

The car has not been lowered.

michaelinmech

Isn't the 325/30-19 you are running the OE size? If so, why would that rub? Perhaps another issue?

rabrooks

That is the factory size, but in the Continentals its a larger diameter tire. I like the tire. So i'm trying to stay with it and adjust the inner fender well plastic parts. Since the ZR1 is running 20's , I thought maybe teh inner fenders have more clearance.

erichg1000

Here I thought I knew all the 325,335,315 /30/19 tires that existed.

I checked TireRack.com and didn't see that size in a continental. Are you sure the size you posted is accurate?

rabrooks

Basically it is a Hoosier R6 tire rebranded by Conti for the rolex series. Or something like that.

AzDave47

The ZR1 rear fenders (and the GS&Z06) are the same dimensions.

You didn't mention that this was a race tire until later. We need more info. For the Continental tire series, the race tires have a max diameter of 18": http://www.continentalrace.com/downl...ional-Data.pdf

For the Rolex series they are 325 and then a race designation not an aspect ratio of 30 as you suggest. http://www.continentalrace.com/downl...-Data-2013.pdf

As far as I know, no one has had any clearance problems with the 325/30-19 Hoosier R6 or A6 on stock offset rims. Are you using a non-standard rim with too much offset?

erichg1000

yes i want to know more. pics of tires as well please.

0Luke@tirerack

the Grand Am / Rolex Conti tires are not street tires (and not available to the general public)

and the tire you have is physically larger than your car was designed for and I don't think there is a larger fender liner .... a heat gun might allow you to massage the liner enough for clearance

AzDave47

I have confirmed with a Grand-Am Team member responsible for tires that Continental does not make a Rolex or Continental Challenge race tire in that size.

Since none of us has had any rubbing problems with 325/30-19 tires, including DOT track tires even in hard use on road circuits, it is back to you OP for more info. Is there an offset problem with the wheels you have them mounted on? Is it a Z06/GS/ZR1 with standard factory rear fenders and stock type suspension? Is the rear alignment anywhere near stock or at least have normal or more negative camber?

erichg1000

Well then how do you get the tires? Do you have to know a bouncer or something?

AzDave47

Grand-Am tires are only available to Grand-Am teams and they have serial numbers that Continental can identify which car and which team the tire was sold to. Under the Grand-Am rules the tire cannot be used on another car (even a team car) than what it was issued to, and it must be used on the position (LF, RR, etc) that it was issued for or the team can get penalized. Each Grand-Am team is limited to a specific number of sets of tires for each Grand-Am weekend.

I'm not certian what the controls are for assuring the tires do not otherwise get used, as the OP suggests he has done.
I have confirmed what the OP has is not any current Grand-Am tire, at least based on what he said the size was.

AzDave47

Luke, the 325/30-19 is the stock size tire on the Z06 and GS. Do you know what tire the OP is talking about since Continental does not have a current Grand-Am tire in the 325/30-19 size for either the Continental or Rolex series?

rabrooks

If someone can tell me how to post pics, I'll go to teh shop and get pics of the affending situation. And yes, in order to get these tires, you have to have a cousin in Miami that has a uncle in New York that rents space to Conti for warehousing

My tire guy has an inside track to these tires and he sells them to us track day guys.

rabrooks

LG has some really nice rear A-Arm bushing replacement parts. They stop the forward travel of the rear wheels under hard acceleration. But they are $1700 a pop
They might stop my problem. It would be alot cheaper to just slow down. Not!!!

AzDave47

If it is a 325/30-19 it should fit. Are you running wheels with a non-factory offset? Stock suspension? Proper negative camber?

It is still not any current Continental Tire Rolex or Continental Challenge tire.

z51vett

Leaf spring sprayed with wheel cleaner making it weaker.
z51vett
Doug

AzDave47

revance to this thread?

z51vett

Don't know how old you are, ever take a torch to a coil spring to lower a car if you have wide tires and wheels they will rub outer side of quarter panel something some people call a rear fender.
So if the spring is weak and coming apart guess what changes the tire to fender well clearance just like wider and taller tires.
z51vett
Doug

AzDave47

Old enough to have had rear springs re-arched on my '65 Plymouth Satellite with the 426 ci wedge and 4-speed. I guess I can see the tie to this thread although we don't know if the OP has changed the composite spring.

Trying to get info out of the OP is like pulling teeth, no info on his car or wheels. Supposedly it is a Continental Tire race tire but not current Grand-Am series. Tough to help him without the info.

rabrooks

The tires are factory Z06 tires. I have no reason to suspect thespring is weak. As I mentuioned earlier, the tires are larger than the factory tires. I am pretty sure this is theentire problem. The rubbing is not the rear fender but the rear inner fender well plastic surround

So as far as every one knows, the inner fender well liner of the ZR1 is the same as the Z06?