Quote:
Originally Posted by masterdrago
When one considers the physical forces on a tire during bumps, potholes, and high speed thrill rides on our wonderful highways then the loading is much different than smooth sailing on flat concrete. Some other genius can do the physics. I agree that 4,400# max load is ~ 1,150# margin/tire on most 5r we are looking at (3791RD GVWR 16,945-pin(2,945)=13,000/4=3,250 carried per tire).
Also consider that the S637 Sailun ST235/85R16 is 31.7" OD and the 235/75R17.5 is 31.6"OD, they are essentially the same size. Rim width is only 1/4" difference and and SW only 4/10" difference. Clearance would not be an issue.
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One thing I notice with LR G at 110# psi over LR E at 80# psi is a little stiffer ride in the 5er. Not huge, but some things left on the counter now moves a little. Going to an even stronger sidewall would give even more bounce inside, more than I'd like possibly.