E Rated tire psi for 1/2ton

[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.