On my 68 Barracuda;
the tallest I have been able to fit is a 28", and
the widest in the stock tubs was a 325 on a 15x10,
but I had to run them at less than 24psi to keep the outboard treads flat on the road.
I have settled on a 295/50-15 that is a lil less than 27 tall, and on a 15x10 I can run 24 psi full time.
Yes, I moved the springs and narrowed the rear to make it work, but the tubs are factory, and the tires are up in the tubs and never rub. And for the 325s I had to slightly bend upwards the lips of the wheel openings at the top, to lower the car.
My car is All Street, but I fit the 325s to track it one time.
BTW
A 295 branded tire, only measures about 295 on a 70% checking rim which is 206.5mm rounds to an 8" rim; it could be 4/5mm either way so from 290 to 300.
But on a 10" rim, a 295 is no longer a 295.
The section width on my 10s, IIRC, is 13.25inches and that would make it a 336, and since the tire height is still 27, that makes the profile to be 45.3% .. So in metric, my 295/50-15 on a 10" rim actually measures 335/45-15....... but the tread of course, has not changed, and is still around 10 inches. Really, 10" rims are barely wide enough for 295s, as witnessed by the low tire pressure I have to run, to keep from burning off the centers.
I got used to the rear "side-shift" at 24psi when ripping around corners, when not spinning. . In fact, I learned to use it as rear steer, and now consider it a feature! rather than a failure. When the tires are spinning, I don't feel it.
