What Wheels/Tire set up on your GT body race car? Options

[jmz]

What's everyone running for wheels and tire size on their race cars?

Do you go with a staggered setup or square?

What size wheel?

What size tire?

What do you run for rains?

So far I've tried

15x8&9 with 245x40x15 DOT comp tires on all four corners Maxxis Victra RC-1

16x10 with slicks on all four corners. Dunlop 265x60x16 slicks


I'm most likely going to run 16x8&9 next weekend with 245x45x16 on all four corners with RA-1s.

I've got some 15x9&11 that I may try down the road with my local club

and when I run COTA with SVRA later this year I'll have to go to 15x8 on all 4.

I'm new to this car and am still learning it and learning to race.

[jmitro]

thread kinda morphed from tires to aero, but I think it's worth noting that in sanctioned racing, one would be rules-limited to tire size and aero (among other things).

For instance, when I raced BMWCCA in Mod class, the wing height was limited to no higher than horizontal with the roofline.

Otherwise, I think Cracker's observations are correct when restrictions don't apply

[jmz]

thread kinda morphed from tires to aero, but I think it's worth noting that in sanctioned racing, one would be rules-limited to tire size and aero (among other things).

For instance, when I raced BMWCCA in Mod class, the wing height was limited to no higher than horizontal with the roofline.

Otherwise, I think Cracker's observations are correct when restrictions don't apply

Yes for sure rules will dictate. I'm looking at SVRA tire rules and really not sure what I will run when I run with that club. Here is what they say:

Group 8 - Molded Treaded Tires
Minimum aspect ratio of 45, except
certain car Make and Models, which
have specific tire requirements listed
in their Supplemental Regulations,
tread depth—no less than 2/32”
remaining, at all times, over 75% of
the tire.
Wheels may be of an alternate
material but must be of period
design. They must be the correct
diameter and width as specified
within the Supplemental Regulations
of the Make and Model.
Tires may not extend beyond the
fender opening at the highest point
of the tire.
Approved tires:

There are no specific sizes listed because of the large diversity of Group 8 cars.
All Group 8 cars must use similar sized tires to what was used in the day, which is pre 1973.
Using oversized tires is unacceptable and when in question, SVRA’s determination shall be
the final word.

Avon: ACB9, ACB10, CR6Z
Goodyear Eagle: 5.50/15 G12 or G12A
Hoosier: Street TD & Speedster
Any Treaded, DOT approved Tires with a UTQG of 100 or greater with appropriate
Speed Rating and a minimum Aspect Ratio of 45
Note: Group 8 must use approved full molded treaded tires, regardless of what
specification tires a car may have competed with in a prior race series.
For Toyo RA1’s and Nitto NT01’s, please see page 6 of this document