Load Range E PSI??

[FirstTimeTruckOwner]

Hey guys!

Just put a set of Nitto Terra Grappler G3s on the truck in LT275/70/18. Unfortunately they only came in SL or E load range and I opted for E.

I don't do any towing, so it's probably overkill, but I'm wondering if it's ok to run them at a lower PSI for a better ride? I had them at 38 and when they warmed up on the highway they got up to around 41-42 and the ride was considerably rougher.

Right now I have them around 35 and the ride is better, but can they be run lower?

 

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[TravisJr]

Not exactly a direct comparison, but a data point for reference:

I’m on 37/13.50/22 Nitto Ridge Grapplers, which are 12-ply (load range F). They are definitely stiff. I run them at 35 front and 30 rear when not towing, and have had no issues. This is not my daily driver though, so I can’t speak to how that may affect wear over time.

Depending on how low you want to go, you may need to reset your TPMS values to avoid getting low pressure messages.

 

[TX_Critter]

You can, try doing a chalk test to find the correct pressure for even wear. Basically you color in with chalk in a strip across the tread and drive a few revolutions on a smooth surface, you want to see the chalk rubbed off evenly all the way across. If more rubbed off on the shoulders and left the middle fully colored then you are under-inflated, if vice-versa then you are over inflated.