Originally Posted by ependydad
I've always been confused with the whole LT tire- I think you would have to change wheels and all to go with them. It was expensive enough replacing my 4 tires with Maxxis, I can't imagine replacing the wheel, too!
Trailer rims can be used with LT, P-metric or Euro-metric tires. However, I would guess under most circumstances you would need to purchase new rims since you have to go with larger tires when replacing ST tires. That is probably the only good thing about ST tires, they have a very large load range capacity for their size. (They sure don't hold up on serious off road trails.)
When I went to P-metric tires on my 228, I went from a factory size of 175x80-13 to 215x70-15. Long story, but the trailer was lifted 4+ inches so I could do it.
And, even factoring in the factoring in the 91 percent rule for the P-metric tire into the calculation (and not sure it was actually needed) the tire exceeds the load range of the factory equipped tires by 150 lbs each.