E Rated tire psi for 1/2ton

[liquify33]

What psi range should I be running unloaded and stock?

TIA

 

[OR VietVet]

Load range E. What does the sidewall air pressure say? That is for a load condition. Run it 10 lower psi otherwise. Too much air will wear the center of tire out first. Too little air will wear the edges out first.

 

[liquify33]

Load range E. What does the sidewall air pressure say? That is for a load condition. Run it 10 psi otherwise. Too much air will wear the center of tire out first. Too little air will wear the edges out first.

80 under load
Neighbor with a 2500 diesel runs his E’s @ 50 unloaded. By the specs 23-ish is about right for 1,700 per tire (based on factory #s).

It rides well @ 30, 35 was harsh but they were brand new and feel better now with a couple hundred miles on them.
I don’t wanna kill them, but I don’t want to kill my back either!!

 

[OR VietVet]

Personally, those lower pressures are too low, IMO. The load range E tire has the stiffer/layered sidewalls and to go that low on pressure seems like it would flex them too much and weaken them. Again, IMO.

 

[Mechanic421]

I run 50 psi ,Nitto trail grapplers I think they are E .

 

[liquify33]

Edituplicate post deleted

 

[OR VietVet]

I meant to say 10psi lower than load air pressure. You can play with that but I like to get the max wear out of my tires and sometimes comfort be damned. I haven't ran a load range E tire in so long. Plus, they always have the taller sidewall. E is for a truck tire and those have the taller sidewall.

 

[liquify33]

Thanks guys, gonna run ‘em up to 50 and see how that does

 

[liquify33]

50 psi rides well, thanks as always to wisdom and experience of the OBS crew.

 

[Dantheman1540]

I run 33in BfG KO2 load E at 35psi when empty and 45-50 loaded. Any more psi empty and it feels like I'm riding a basket ball. They have worn very well but I rotate every 3-5k.

 

[swathdiver]

What psi range should I be running unloaded and stock?

42 PSI just allows the tires to exceed the rear axle's load capacity and that is what BFGoodrich currently recommends for the 1/2-ton Suburbans. Previously their recommendation was 50 psi. A 3/4-ton with the same 265-70-17 tire in an E-Load has a door sticker calling for 50 PSI up front and 60 PSI in the rear.

I ran mine in the 30s and low 40s when new and experienced even though rapid tire wear. I bumped them up to 50 psi and the wear all but stopped but eventually started to wear a little more in the center, about 1/32nd less after 30K miles. I keep them at 47 PSI cold now; all around.

FYI, 42 PSI is plenty to haul a load, the tire's capacity at 42 psi exceeds the 4200 pound axle capacity (2150 per tire).

 

[iCajun]

What is the tire rating, 80 psi @ 3195 lbs?

 

[HiHoeSilver]

Similarly to James and his KO2s, I'm running my 275/70/18 Grabber ATX (E) at 44 cold, unloaded, with good results so far.

 

[liquify33]

What is the tire rating, 80 psi @ 3195 lbs?

Correct.

Thanks for your help guys, 44-50 ballpark is much better, just need to tune it in a bit now.

 

[iCajun]

Using your tire numbers and my 5720 lb 2-door works out to be 38 front and 34 rear.