GhostC6

ok, that makes it easier and the speed odometer should not be off much, depending on which tire you choose and size, to give you the exact details in my case I did this last week so it is fresh in my mind.

On the back, my stock tire was 285/30/19 Michelin Pilot Sport PS2 ZP Specs:
31 lbs. 11.4" Wide 25.8" Diameter Revs 807

My new tires are Michelin Pilot Sport PS2 305/30/19
Specs:

28 lbs. 12.3" Wide 26.3" Diameter 788 Revs

So as you can see, my new and wider tire is 3LBS lighter per tire, almost 1" wider and 1/2" taller resulting in 19 LESS revolutions per mile. So this will impact my speed odometer to some degree.

Play with this if you feel like it

http://tire-size-conversion.com/spee...r-calibration/

But, like I said earlier, your Engine tuner or a transmission tuner or some of the individual tuners like Diablo will allow you to correct this problem.

Hope that helps some

petsur

Any tire rubbing with the bigger PSS's? I run HPDE's and don't want to deal with rubbing.

FAUEE

Nope, no rubbing ever. They're about the best HPDE tire there is IMO. Holds up great on the track, comfortable around town, good in the rain, great grip, and don't wear out super fast. They're expensive, but worth it.

stp357

Would love to see some pictures. About to place an order.

GhostC6

Hey, what size and type of tire are you running now and what size and type are you getting ready to order? This way we can all give you better and more accurate information. Larger Tires is not enough information.

Give us what you currently have and what your considering and we can all go from there to help before you order. It is always better to take an extra day to make a decision rather than having to live with that decision until you need new ones again or have to buy another set which at the price for these tires is not cheap to just toss away. Even if money does not matter you could use it for fronts instead which I will need come the end of this year.

stp357

Right now I have 275/35/18 front and 325/30/19 Goodyears. I am going to get Bridgestones, but wanted to see pictures of Vettes with larger tires to make the final decision.

GhostC6

What brand of Bridgestone's and what size? 335 or 345 or 355? The more we know the more we can help.

stp357

RE050A Pole Position. If I decide to go larger than the OEM size, that will be determined based upon the look that it gives the car.

GhostC6

OK, that helps, the only size bigger than what you have in that tire is the Bridgestone Potenza RE050A 345/35ZR19 that weighs 35LBS each, is 28.6 in Diameter and 13.8 inches wide.

Your current tire is a "Goodyear" still vague, if it is the OEM F1 Supercar EMT in the 325/30/19 is 26.7 Diameter and 13.2 wide even the non run flat is same size.

So with this said, if you go with the Bridgestone tire it will be a little over 1/2 inch wider, .6 exactly and almost 2 inches taller, 1.9 exactly.

The width is nominal, will notice a little, the diameter/height, is a big difference. That will change your speedometer accuracy and miles on the car as it takes less revolutions per mile, it will show you going slower than you actually are, I think. It will fill the wheel well up more because like I said its almost 2 inches larger in diameter.

So when your speedometer says you are doing 65 you will actually be doing 69.5 mph.

Does this help or confuse you more..lol

Also, those are some wide *** tires, my friend is putting 335 Nitto on his and they look like rubber barrels not tires..lol

stp357

I t definitely helps, appreciate the info. Can you post or point me to a pic of your car?

v1 rot8

Interested

GhostC6

Not the best pic and not with my new rear tires but a general idea..





My C6

Wayne O

How do you use your car and what do you want to accomplish? Are you looking for performance and/or aesthetic benefits? My C6 is a dedicated track car so for me form follows function. I'm not a big fan of taller wheels. Like virtually all serious Corvette road racers I know, I use 18" wheels all-around (as did the factory Corvette Racing C6.R's and the current C7.R's). FWIW I use 11 x 18 wheels front (with up to a 305 tire) and 12 x 18 rear wheels (with up to a 345 tire).

IMHO for 'normal' street use I think you're fine with stock Z06 tire sizes....275's front, 325's rear. Although I feel there are advantages to using 18" wheels all-around, the factory 18/19 configuration is fine. If you don't want to change things to run 12" wide rear rims you can easily use 325 tires on 11" rear rims WITH THE PROPER OFFSETS. A knowledgeable wheel manufacturer such as CCW can help you to accomplish this if you're interested. Good luck whatever you decide on.

RC4G

Don't forget the additional benefit of a slightly wider than stock tire on an OEM wheel, less likely to scar a wheel if you lightly rub a curb.

GhostC6

I like your avatar, reminds me of when I was younger and healthier..

GhostC6