26x9.5x14 QTP on 5.5” Rally Wheels

33IMP said

Those are not drag radials, they are basically rear drag slicks with slightly thicker sidewalls and a couple grooves, to make them D.o.t. legal.
It could be done. I'm assuming it's cause you have small pattern rallyes, and you don't want to buy 15x7 rallyes, ( or they are backorder till kingdom come).
Since those are one of only two performance/race tires in 14s that I found, I would give it a shot. But I think you would be happier with the other tire I found, M&H muscle car drag race tires. They are also bias ply but they have a longer lasting compound and real streetcar tread. They are roughly the same size, 235/60x14. MNH-MSS002 in summit catalog.
All in all, the better choice, in my opinion would be to get some aftermarket 15" rallyes and have your choice of hundreds of tires. They are made in 5 on 4.

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oh no question they will mount on the 5.5” wheels but its not ideal, the 5.5” wheels will suck the sidewalls in which will increase the diameter and cause the tire to crown. Also since the tire will be more ballooned or crown more a very low tire pressure will have to be used to maintain a proper contact patch. Lower than youd probably want. i realize they arent radials, still puts added stress on the sidewall. The tire manufacturer lists a rim width range for a reason. I agree a lot more options in 15”

also have to remember, the 26x9.50-14 has a tread width of 8” and a section width of 10” so with a 5.5” wide wheel the sidewall will be out about 2-1/4” on each side from the wheel. Also with a wide tire on a really skinny wheel it wont be as stable, there will be more side to side movement of the wheel relative to the sidewall of the tires