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Didn't mean to stir up a hornets mess. Being in the RV industry for almost 30 years, most tire failures I see are from under inflation or ozone damage. Under inflation is worse on tires than over inflation because it generates heat. The max psi cold on a tire is for max load. If the max load is less, lower max psi may be OK. I am not a tire expert, however if one reads the Goodyear RV Tire link I posted, it has a lot of good info in it that pertains to all brand tires. I'm not pushing GY Tires, but I haven't a trailer tire in another brand with a 75MPH speed rating. JMHO, Kerry
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