Montana Owners Club - Keystone Montana 5th Wheel Forum - View Single Post

CaptnJohn · 06-25-2017, 11:27 PM

John, thank you for being a Sailun customer. Inregards to your inquiry, I am assuming the weight you provided was fully loadedand that you have two axles (4 tires).
The math works out to 3500 lbs./tire. I have attachedthe load and inflation table for ST tires. You will see that at 80 psi,the tire will carry 3640 lbs./tire. So, you can go as low as 80psi. If you want to build some safety in, you can run your tires at 85 or90 psi. The issue with putting too much air is you will find your trailermay “bounce” a little going down the road. You may have to experiment alittle to find the optimal pressure.

You will see the chart only shows up to a 10 ply (“E”) ratedtire. For each 5 psi increase in air pressure, you can carry anadditional 120 lbs. of weight/tire. up to 110 psi.

Hope this helps. Safe travels.

Al Eagleson‘ACE’
Director, Commercial TruckProducts

06-25-2017, 11:27 PM	#24
CaptnJohn Montana Master Join Date: May 2017 Location: South East NC Posts: 1,768 M.O.C. #19865	John, thank you for being a Sailun customer. Inregards to your inquiry, I am assuming the weight you provided was fully loadedand that you have two axles (4 tires). The math works out to 3500 lbs./tire. I have attachedthe load and inflation table for ST tires. You will see that at 80 psi,the tire will carry 3640 lbs./tire. So, you can go as low as 80psi. If you want to build some safety in, you can run your tires at 85 or90 psi. The issue with putting too much air is you will find your trailermay “bounce” a little going down the road. You may have to experiment alittle to find the optimal pressure. You will see the chart only shows up to a 10 ply (“E”) ratedtire. For each 5 psi increase in air pressure, you can carry anadditional 120 lbs. of weight/tire. up to 110 psi. Hope this helps. Safe travels. Al Eagleson‘ACE’ Director, Commercial TruckProducts