4x4x4door
Senior Member
- Joined
- Jun 2, 2017
- Posts
- 156
- Reaction score
- 58
- Location
- near St. Louis
- Ram Year
- 2016
- Engine
- Cummins 6.7
Bought a new 2017 2500 cummins a few weeks ago and the dealer had inflated the tires to 80-85psi cold with nitrogen. When driving on the highway they would heat up to 90psi. This being my first HD RAM truck I didn't think much of it until I went over a local pass at 6500 feet elevation and shortly after the TPMS light went off. I flipped the screen over to the tire pressures and they were at 81-82-83-84 front to rear. I couldn't think of a reason the TPMS light was chiming. That got me thinking of what the proper pressure should actually be. When I got home I checked the door and saw 60/80 so I set it at 60/70 and no light or chimes but only drove it a short distance after the change. This isn't my daily driver so maybe it will come on later?...
Well anyways... After doing some research I ended up here. The tires are what came with the truck, Firestone Transforce HT. What is ideal for these tires? Right now I only pull a 12k dump but I don't load it to the max either.
I have heard of others saying that high pressure has made their warnings go off too so that's likely what happened. Be sure to read post #1 in this thread for tons of updated info. You'll find that the lights and warnings for you Cummins truck will come on at 52 front & 64 rear. I don't have that size tire but I'm guessing 50 front & 45 rear when empty would yield a much better ride and tire life. I'd certainly use a minimum of 75 in the rear when towing. Of course, all the lights and warnings will come at those settings but that's a way to fix that