largest tire on 14" rally wheels

roccodart440 said
The minimum recommended wheel size for a 245/60/R14 is 7". So we are talking an extra .5" per side.

I run an 11.25" rim with a 12.50 tire. That's pretty ideal. But trust me when I tell you being .5" out of spec is nothing.

Again a dually cummins truck comes stock with 235/80/17 Which are 9.60" section width on a 6" rim.

You can run any tire "out of spec" that you want, until they fail, and your insurance company will not cover the claim because of the "out of spec" conditions! Try finding a tire store that will mount tires that are too wide for the rims, none of them will mount them and accept the liability, just as they will not mount a tire that is out of the recommended date code restrictions!

With today's tire and rim designs, it is becoming increasingly difficult to get anything but the exact recommended tire size to work at all! I have a friend who has been the manager of Discount Tire for the last 30 years, who knows tires inside and out, and will not go outside the recommended parameters for new vehicles! Too much liability from the Sue happy public to take on any such risk at all! And, if you can get a mom and pop gas station to mount your tires out of conformance, good luck getting them to cover any sort of liability at all!!