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Trailer tire spaceing


gs311

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What is considered the min. distance between tires on a single wheel tandem axle trailer? Have about 2 1/2 inch now but want to change to G614 tires that are a 1/2 inch taller. That would leave me only 1 1/2 inch separation, is that enough?

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The minimum is 1.5" between tandem tires. A tire can "grow" as much as 3/4" in diameter when at running temperature and at speed. I went to Sailun S637 235/85R16, LR G tires on our 5er and had to have both axles moved farther apart (2.5") to prevent contact while maintaining the 60/40 weight ratio.

The time and expense was well worth the cost IMO, I never had another tire problem.

Aluminum rims have the maximum air pressure rating cast into the back-side of a "spoke". Steel rims have it stamped into the inner rim, hidden by a mounted tire.

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Tires now are Akuret ST235/80 R16 Load E. Have been told by Columbus camper group that wheels are rated at 110psi. will have tire changer make sure if I go this route.

The G614 tires are not the a 1/2" taller. Go to Goodyears website. The G614 has the same diameter as the ST235/80R16s. I know this because I put the G614's on my 5th wheel a couple of months ago and I had the same tires as your current ones and the gap didn't change. I keep a 100 PSI in them. I did a lot of research and I new I was going to get these tires eventually. But after I had a blowout I got rid of those china bombs. I was hoping the Akurets would last a little longer but that didn't happen.

I did install a TPS system with these tires.

 

James

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If you need to replace rims to get 110 psi rating, you should consider getting 17.5" rims. A 215/75R17.5 has the same diameter as a G614. You would have more choices of good brand tires.

 

Also, as an example, the G114 (215/75R17.5) is lower cost that a G614 because of greater usage in the trucking industry on electronics vans.

 

A discussion on doing this Tire Size Change

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Thanks James, that makes me feel even better. Was going by what my tire guy told me. At my age I should know to do my own research.

My pleasure. I checked the inside of my rims to make sure they were rated 110psi. If I had to replace the rims I would have done what Mark said. I like these tires they look and feel great.

 

James

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  • 3 months later...

I

. ....Our 5er came from the factory at 1", the minimum recommended by Dexter. We run XPS Ribs and have never had a tire fail. 3 axles.

X2 We have the XPS Ribs for 3 years since our previous BF Goodrich Commercial TAs were recalled. This is an excellent tire with no problems in about 25k+miles service.

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