Fleet Equipment Magazine: Tire pressure recommendations

Yep the more flex you have in that little bulge on the bottom the more heat is generated. The heat breaks down the materials in the tire and KaBOOM!

 

I follow the tire sidewall specs.

110 Steers
105 drives
110 trailer,.. And trailer tires actually call for 130 PSI.

This combination works best for my setup. Both trailers are 53' step deck with 255/70 22.5 tires on 10'2 spread.

I run 22.5 11R on my Columbia. Michelin Steers and Yoko 517 drives.
I run 24.5 LP on my KW. Michelin Steers and Bridgestone drives.

Hurst

 

Max air psi is great for rolling resistance, fuel economy. However it is not great for tire life. Been a owner op and a fleet mechanic. I tested and proved it. Are you loaded 100% of the time? No nobody is. You dont need that high of psi. I hate to admit it, and miss him but my old man was right and I tested and tried all combos. 90 or 95psi n steers is the best. 90psi in everything else. The ride is better and if your worried about being heavy, that old guy was a rolling steel warehouse. Get my point. Now high speeds and age of tire has more to do than weight. The sun naturally brakes down the rubber, rubber is poris, and the chemical compound of oxygen has a reaction to rubber and ultraviolet light. This is why nitrogen leaks out of the tire less. The molecules are larger, plus its a dry inert gas. No reaction to natural rubber. No I don't have a nitrogen compressor yet. But would like one. Plus been hauling heavy on lp 22.5 for years. You dont need big rubber. Sure they will last longer, but the lighter tires, wheels have lower rolling resitance. The lp 22.5 are the cheapest, most availiable, and have the best casing credit. Big rubber this day in age is good for ground clearence, nothing else. Remember its not that long ago guys were hauling heavy on 11, 10:20's.

 

I've tried and tested as well.

100 psi in Michelin steers and they will wear uneven and start to cup around 80k mi. By 120k they are beyond sanity and need to be replaced. Running 110 psi and I will get 200 - 230k mi out of them every time.

Drives it depends a lot on the brand but get best results and fuel economy with 105 psi in them. Typically see 300k out of my drives.

Same with my trailer. Tried 100 psi and they were chewed up by 80k. 110 psi and I get better fuel mileage and 130 to 140k mi out of them.

I'll follow what works for me.

Hurst

 

Oh I know that different things work for different people. Im not a fan of steer on any longer that 100, 120k. I pull them and put them on a trailer. Straight up, and finish there life on the rear were a blow out aint a wreck. If if gonna put new tires on its the steers. If a trailer needs two, I will pull steers early and put new steers on. Even at 50k. And I second the Michelins. Cant beat them.

 

Look at the load/inflation tables on the tire manufacturers website.
They design and make the tires. Who would know better about inflation?

You will find it varies depending on how much weight the tire carries.

I have been going by the load/inflation table for years and have had good results.

You will find most people overinflate considerable.