Quote:
Originally Posted by Carl n Susan
You are correct, they used to be an extra cost option on Montanas. Then RVIA (or somebody) moved the goal posts. No longer do the tires just have to exceed the axle rating, they have to exceed it by 10%. So a 7,000 lb. rated axle needs tire capacity of 7,700 / 2 lbs (i.e. each tire rated at 3850 lbs). The GY G614 is a Load Range 126 or 3748 lb. tire, just short of the 10% requirement. Hence the Sailuns became the standard.
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We got our 3791 just when that new RVIA rating changed and it came with the Sailun 637 ST235/80R16 rated at 4050#. My question has always been why are the rims rated at 3750#? When I replace, I want to go with higher rated rims (17.5") and the appropriate tire.