Trailer folk: Jack the frame – not the axle

By Russ and Tiña De Maris When we were new to the RVing-with-a-trailer set, we bought an older fifth wheel that had been sitting about on its tires for some time. Lots of tread left, sure, but the tires themselves had been exposed to plenty of UV radiation. Our RVing mentors “learned us” quickly that just because there’s plenty of…

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Tire failure could have been prevented with TPMS

RV Tire Safety with RV tire expert Roger Marble This tire failure was not a “blowout,” but definitely was a Run Low Sidewall Flex failure. The cause was not having a tire pressure monitoring system (TPMS). I read the following on an RV trailer forum: “BOOM, it happened again; however, this time it was with the upgraded Maxxis tires. It…

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More on why trailer tires fail more than tow vehicle tires

RV Tire Safety with RV tire expert Roger Marble On a thread on an RV trailer forum Peter made this statement: “At highway speeds interply shear is not as much of an issue, as I understand things.” I posted this reply: Speed itself is not the issue that causes interply shear in radial tires. Two things happen to radials when…

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Why do trailer tires fail more often than tow vehicle tires?

RV Tire Safety with RV tire expert Roger Marble Here is a question posted on a travel trailer forum: “Why so many trailer tire failures and so few, if any, tow vehicle tire failures?” This post could be considered Part 2 of my post of last week, How do you figure an ST-type tire’s maximum safe speed? The primary reason,…

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How do you figure an ST-type tire’s maximum safe speed?

RV Tire Safety with RV tire expert Roger Marble Originally posted on an online forum: “The 65 mph is not really correct. It depends on load and air pressure. They can go to 80 mph.” As I have pointed out previously: The load formula that populates the Load/Inflation table, used by the tire industry for ST-type tires, is based on the assumption…

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Pros(?) and cons of dual tire air balance systems

RV Tire Safety with RV tire expert Roger Marble I read a thread on an RV forum about connecting two tires in dual position, with hoses to “balance” the inflation pressure. There were some claims made about performance improvements, but IMO the conditions necessary to deliver those improvements are pretty extreme and improvements are tenuous. The information on the function…

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