Ask someone to measure please.I ran 2 sets of 29/12.5 /15,on a 15 by 8 ansen slot.Both measuned between 27 to 27.5 tall,aired up properly.This was on an El Camino. As for the 11.50 gig,just roll it out of the hole.Learn the car.
That's true, most don't measure there exact rating. Just have to be careful, because the lower radius on a soft wrinkle tire is less at rest and at speed they will grow a hair.