seefour

I ran a set of 26 x 8.5 x 15 et streets on a 15 x 8 rim with 13 lbs air pressure years ago and ran 1.48 60 tf's at 3450 lbs on nitrous

something i learned was to stretch the tire on a rim atleast as wide as the tire tread
10 inch tire 10 or 11 inch rim

I ran a 28 x 10.5 x 15 et street witha 15 x 8 rim and had to run more air pressure to get a flatter contact patch

Mike S