STANG KILLA SS

305/30/19s for the rear

recommended wheel size is 10.5 to 11.5"
of course the wheels im getting are only available in 10" or 12"
both equally 1/2" away from recommended.

will be a dedicated HPDE car.
which size would you choose?

pics would be a huge help too, to see bulge or stretch.

Tomswheels

12, a bit of stretch is always good for track. I know it's not exactly the pic your looking for, but the front shows 275s stretched on a 10.5, the rear shows 315s on the same 10.5. The 275s had much less "squirm" in hard corners...

0Anthony @ LGMotorsports

FYI we ran 275's on a 10.5 in World Challenge to get as much tire contact as we could.

The Camaro WC car ran 305's on all four corners but we were rule limited to 10 front and 11 rear wheels for the cars.

froggy47

Pick a different wheel?

Scooter70

I thought C5Z rears were the only acceptable track wheels.

STANG KILLA SS

so seems like 2 votes for 10"
that would shave a few pounds too.

changing wheels isnt an option. i want what i want.

klodkrawler05

I'd say it depends on the tires as well. A tire like the Bridgestone re71 will run wide and could easily fit onto a 12" tire without much if any stretch.

for example here's one of the 305 bridgestones next to the 335 rival S. the rival fits on a 12" well but could easily fit on a 13" without stretch.

FASTFATBOY

305/660/18 on a 18x10.5