Community Forums

jjva343 · 04-14-2015, 02:13 PM

I recently purchased a 2050 Damon Astoria 3595. Inside on the wall, it indicates a normal required pressure of 120 psi. Does this seem right? It seems high to this inexperienced RVer. Thanks.

BFlinn181 · 04-14-2015, 03:07 PM

Those pressures for tires are very misleading. They usually indicate inflation pressures at maximum weight capacity. To properly inflate your tires, get the RV weighed. Four corner weight is best, but even by axle is better than nothing. Once you have the weights, go on the website for the tire manufacturer. They have tables that give pressures for each axle or tire load.

You'll find ride and handling will improve with proper tire inflation.

rivraton · 04-15-2015, 12:28 AM

Quote:

Originally Posted by jjva343

I recently purchased a 2050 Damon Astoria 3595. Inside on the wall, it indicates a normal required pressure of 120 psi. Does this seem right? It seems high to this inexperienced RVer. Thanks.

Are you sure that is not a reference to the air brake system? 120 psi is the normal operating pressure for that system...

jjva343 · 04-16-2015, 01:37 AM

I'll check. Thanks.

BFlinn181 · 04-16-2015, 08:51 AM

120 psi is not too high for a 22.5" tire. It is probably (according to brand) close to maximum load rating. As I said, the Federal required label next to driver's seat lists pressure for maximum loaded RV -- with the tires originally on the chassis. What a tire in the future (2050) will require is at best a guess. Get RV weighted, check at tire manufacturer's web site for suggested psi, enjoy a better ride.

120 psi has nothing to do with air brake pressure, it has to be high enough to release the parking brake.

rivraton · 04-16-2015, 05:07 PM

Quote:

Originally Posted by BFlinn181

1

120 psi has nothing to do with air brake pressure, it has to be high enough to release the parking brake.

Really? You can release the spring brakes @ 60psi, and the low air warning will be sounding. Normal operating range for an air brake system is 100 to 135 psi. the governor is set @ 120 psi from the factory. The decal / placard in question may very well be in reference to the tire pressure, I can't say, however 120 psi is extremely high for tire pressure. I spent the last 25 years of my working life as a heavy truck tech and fleet maintenance supervisor for a large fleet, and never ran more than 100 psi and that was on COE tractors with a set-back front axle.