Tire pressures

[spattyvb]

G'day all.
What pressures are people running for Nitto Ridge grapplers 1500 ram
33 /12.5 /20
80 psi max I see but everyday running?
I've tried 36 but think it might be a bit low.
Any thoughts out there.
Cheers Rammers

 

[Big Jim Swade]

They must be 10 ply with an 80psi max? Look at the max load on the sidewall at 80psi, then adjust the pressure to the weight of your truck. If the tire has a max load of 3,000 lbs @80psi = 12,000lbs. total vehicle weight. If your running a half ton truck, it probably weighs less than 6,000lbs, so 36-40psi should be plenty.

 

[Scram1500]

I run my E rated 33's at 44 up front and 36 in the rear when unloaded. I monitored tread depth across the tire to dial in the best psi