LT tires on TT
I was telling a buddy of mine how I upgraded my TT tires from ST's to LT's (Michelin RIBS) and he would like to upgrade to LT's also. He asked if he could go to any LT tire as long as they had the cor...
Forum Discussion
gmw photos wrote:
Yes, I recall you answering the question about the speed at which the tests were performed, because I recall wondering at the time how much "more" stressful the test is at 75mph vs 50. Assuming the same weight for the sake of argument ( I know it's different, but to get this down to common denominators ), do you have an opinion on how much more stress the added speed creates ?
I don't need to have an opinion. I can look it up in the Tire and Rim Association yearbook.
For LT tires: Speed range vs inflation pressure vs % increase in load:
66 to 75 mph - +10 psi - No change in load
56 to 65 mph - No change in pressure - No change in load
46 to 55 mph - No change in pressure - +9% increase in load
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That first entry is the equivalent of a +10% load increase, so overall the difference is about 20% going from 50 mpg to 75 mph.
Note: The difference in load carrying capacity between an ST and LT is about 20%.
