42 replies to this topic

[Squatch]

This is the 1st time I've ever installed E rated tires on a 1/2 ton truck.

 

In the past any e rated I've run have been on heavy trucks that came with them. So I just use OEM specs.

 

For those of you who have done this. Did you stay with stock air pressure or raise it because of the tires?

 

So far I've gone up a couple of pounds. Stock is 29F / 32R. I'm currently running 32F / 36R. Seems OK.

 

I also went up a size. Historically when going to bigger tires I often need to drop pressure due to the larger volume in the tires. But this time it wasn't a dramatic size change.

[Advmoto18]

Good question!

 

With our truck/camper rigs, the tire psi placard on a vehicle will lead you astray because it is a regulatory placard, not a common sense operating placard.

 

Best to use the tire manufacturers recommendation adjusted for load and desired handling.

 

Here's a pretty good read that sort of touches on the subject.

 

And a similarly themed article here from 4 Wheel Parts.

[idahoron]

I have a 05 Tundra and I am running 50 in the front and 55 in the back. My tires are Michelin E rated. I run them in the summer months.

[iowahiker]

My F-150 has OEM LT245-75R17 load range E tires (payload package) with door sticker tire pressure of 55 psi front and 60 psi rear with an empty truck weight of 5500 pounds, GVWR of 8200 pounds, and an actual weight of 7500 pounds with the camper loaded and wet.  These door tire pressures are most likely above "tire charts" but that was Ford's choice and the ride/handling with the camper is perfect with our OEM heavy duty suspension (heavy duty springs and shocks at all four corners).

[Stalking Light]

I'm running 45 in the front and 55 in the rear on my Tacoma/Eagle with BFG KO2's. I do have an Aluminess rear bumper with swingouts for the spare and a deluxe box which is why I run higher in back. Seems to ride and wear well with these pressures.

[Happyjax]

Article was good. Learned a lot Thanks

[takesiteasy]

Toyota gave me some new door stickers for running LT tires on the Tacoma. I can't remember offhand the new recommended pressures but they are higher than the P tires. In the mid-40s psi if I remember correctly.

 

Edit: checked the labels- 46 psi front and rear for LT265-70-16.

Edited by takesiteasy, 14 January 2017 - 07:52 PM.

[Squatch]

I just sent Cooper an Email telling them my truck and camper specs and the tires I'm running and asked them for a inflation recommendation. But it seems I need to add some air anyway. 

[poncho62]

If you look closely at the sideway of your tires, it gives you the recommended PSI & Max weight that the tire should take. I put Lts on my 1/2 ton....It says 65 PSI for 3200 lbs on each tire.....I am no where near that weight on each tire, so run 50 PSI.....Rides good. 

[SunMan]

35 front, 45 rear on 285/75/16 BFG KO2s