Psi

[retispcsi]

Question is for the folks running 235 75r 17.5 18 ply tires on their Suites. What psi are you running. The reason I ask is the guy at the commercial tire place told me to run 100 lbs to 110lbs. He said the lowboys running these tires hauling heavy equipment run that psi range. Now I am from Fla. and I know with the heat the tires heat up pretty fast. This goes for anywhere in the country. So just seeking comments.

[lwmcguire]

I ran mine at 110 on the Landmark using nitrogen

Watched tire temperature and checked psig each spring

[Cummins12V98]

Use the weight/inflation guide for your tires. Weigh your tires individually if possible. Add 5psi to the heaviest tire per axle.

This is directly from GY Tech. To blindly say 110 is irresponsible!!!!!!!!

[rynosback]

I run 125psi as that is what DRV specs it at. Tires are wearing well. I think on Goodyear’s chart I should be 115-120 psi. So I just run 125 psi.

[ewacowboy]

I am right at maximum weight on my coach, so I run 125 COLD. I check the tires every morning on travel day before the sun hits them.

[MS60ocb]

Originally Posted by ewacowboy

I am right at maximum weight on my coach, so I run 125 COLD. I check the tires every morning on travel day before the sun hits them.

X2 Because the weight chart versus pressure say 125.
Wear indication seems to agree, even if the wear indicated I was over inflated they would be replaced first because of age.

[ducksface]

Is the old tire chalking method(look it up) not valid anymore due to technological changes or ply?

I've chalked a lot of tires to great success, but I hadn't, until just now, thought to chalk the 24.1.

[E12CHENG]

I did look it up as I had never heard of this. I think this is cool and something to do just for the fun of it. Good information from all thanks.

[Porthole]

Originally Posted by ducksface

Is the old tire chalking method(look it up) not valid anymore due to technological changes or ply?

Well the "old chalk method" of police marking vehicles was recently ruled unconstitutional (4th amendment) by the 6th US Circuit Court of Appeals.

[Cummins12V98]

Originally Posted by ewacowboy

I am right at maximum weight on my coach, so I run 125 COLD. I check the tires every morning on travel day before the sun hits them.

What does that have to do with the weight that is actually on the tires?

[Cummins12V98]

Tire charts are there for a reason. By knowing actual weight and adding 5psi to the chart you will have best braking, best ride and best stopping. But there is always air to MAX.

[lwmcguire]

Originally Posted by Cummins12V98

Use the weight/inflation guide for your tires. Weigh your tires individually if possible. Add 5psi to the heaviest tire per axle.

This is directly from GY Tech. To blindly say 110 is irresponsible!!!!!!!!

I found 110 psig to be the sweet spot where my tires all stayed cool driving in 100 degrees ambient

The right rear passenger tended to be the heavier loaded tire

To say to add 5 psig to a single tire is irresponsible even if the GY tech and not Cummins said it

Always run both tires on an axle at the same psig

[Cummins12V98]

Originally Posted by lwmcguire

I found 110 psig to be the sweet spot where my tires all stayed cool driving in 100 degrees ambient

The right rear passenger tended to be the heavier loaded tire

To say to add 5 psig to a single tire is irresponsible even if the GY tech and not Cummins said it

Always run both tires on an axle at the same psig

Maybe I should have drawn a picture. The added 5psi is for BOTH tires. As in whatever the heaviest tire is on each axle use that tires weight on the chart then add 5psi to that and apply to BOTH tires on that axle. Clear now?

[lwmcguire]

Travel trailers and trailers in general handle better with the same type tires and same inflation in all tires

And at the proper inflation for the heavier loaded tire

Most travel trailers and 5th wheels have one side that is heavier

The majority of blow outs are not because the tire was inflated to high

Everyone running lower psig to soften the ride are going to have higher tire temperatures