ExRocketScientist wrote:
Atlee wrote:
From reading this long thread, I get the idea that many folks want to go to a larger size TT tire because they are on the ragged edge between the weight of their loaded TT and the factory supplied ST tires. There is little margin for error. Is this correct?
Now to my situation. I just bought a used HiLo TT. The GVWR is 5,500#. The GAWR is 3,500# each, totaling 7,000#. The ST205/75R15 LRC Goodyear Marathon tires have a weight rating of 1,820# per tire at 50psi, totaling 7,280#.
Given these numbers, I presume "margin of error" isn't something I need to worry about, WRT the axles and tires. Am I correct?
Interesting side note. They are factory supplied tires. The 2 on the left side are USA Marathons built in 4408. The 2 on the right, plus the spare, are Chinese Marathons built in weeks 08,09, & 10 of 2008.
Yes many people are upsizing so they are not running on the ragged edge. It appears that the manufacturer of your HiLo is one of the few that did not cut corners with the tires. Probably why they went belly up.
Maybe that is a contributing factor. HiLo manfactured the trailer I have now, virtually unchanged UVW and GVWR for 15 to 18 years or more. When they were building my size trailer in the 90's with the same gross weight rating, they were using 13" tires. At that time, I suspect they were definitely on the ragged edge.
