Sailun 637 tire pressure for 337RLS?

[Hoopy Frood]

Thanks Ranchertx. That formula gives me a 63% and using that to the max 110 psi pressure gives me 70psi. At 70 psi, the Sailun chart says the max load on the tire is 3,360 which is well in capacity for the the 2,800 pound load.

I think 70psi would work also, but again am concerned about heat buildup. Perhaps the head buildup isn't as bad on a LRG tire vs. a LRE? Dunno. Thougthts?

Watching the heat build-up with your TPMS and comparing it to what your old tires did might give you a decent idea on how low is too low...pressure that is. I ran my old Sailuns at around 90 psi with a load per tire very close to what you are indicating. I was uncomfortable running them under 90 psi simply due to concern over sidewall flex. Those tires last over 6 years, and the trailer seemed to ride well. FWIW, the Sailun tires do have very stiff sidewalls.

[timlisajax]

I have run them many miles at lower pressure's without issues. The heat comes from load and sidewall flex, but at the pressure you are saying you want to use it will not be an issue.

Over inflating just causes unnecessary wear to the trailer because of a harsh ride.

Thanks for the input.

[timlisajax]

Watching the heat build-up with your TPMS and comparing it to what your old tires did might give you a decent idea on how low is too low...pressure that is. I ran my old Sailuns at around 90 psi with a load per tire very close to what you are indicating. I was uncomfortable running them under 90 psi simply due to concern over sidewall flex. Those tires last over 6 years, and the trailer seemed to ride well. FWIW, the Sailun tires do have very stiff sidewalls.

Thanks Howard. Good idea. We're taking a short trip in the near future. Think I'll start at 80psi and check temps on the TPMS. On the return trip, I'll drop them to 70 psi and check temps again. Somewhere between 70 and 80 psi seems like it will be the safe sweet spot.

[huntindog]

Thanks Howard. Good idea. We're taking a short trip in the near future. Think I'll start at 80psi and check temps on the TPMS. On the return trip, I'll drop them to 70 psi and check temps again. Somewhere between 70 and 80 psi seems like it will be the safe sweet spot.

the ride difference between 70-80 doesn't amount to a hill of beans