I have a ex Sunbelt rental T5. The stock 9.50-16 tires are destroying my yard, I need a more turf friendly tire.. From what I have been able to find out the factory offered an optional 31x15.5-15 which is at least 2 inches shorter than the 9.50-16 which is advertised as 33.3. After looking at the tractor for a bit a wider tire may have clearance issues with the outriggers and maybe thats why they reduced the diameter. Pickings seem to be very slim and expensive for wide 15 inch tires. I am wondering if anyone has played around with other than stock tire sizes. I would not be adverse to a light truck tire but only found a couple of them . I was lucky to pick up a set of 12 inch wide 15 inch rims in perfect shape so I have that covered.