I have a 2010 TRX4 w/ 275/70R17 tires, it looks like you have the same vehicle. The sticker on the door states 37 psi, which is what I run. My tires do say 50 psi max. I have had many -0 weather and my TPMS has never gone off. I am not sure if the stock tires have nitro or not.

 

My truck doesn't have TPMS (thank goodness because I air down off-road a lot). But my Grand Cherokee does. It's pre-set at the factory to go off at 28 psi for low and 44 psi for high, so if you are at 37 psi, it'd would take some real extreme temps to effect the tire to hit outside that range...

 

Does anybody know if Ram's from the factory have nitro? I have never put air in mine (maybe service?). Thanks hammer by the way, I always wondered what the range was, it is good to know.

 

I can't swear that the pre-set range on a Ram is the same, but I know for 100% certainty that's the range on my Grand Cherokee...

 

I always wondered what happened to Mr. Wizzard when he retired from TV----
Jay

 

Get into the habit of checking your tires at least weekly. Run the same pressure year round, and it can be found on the door post. My post says 40, but I run 42 because that's where I get a 10% pressure rise hot/cold. Tires are rated to 44 on my truck.

You lose/gain approximately 1# of pressure, for every 10 degree F temperature change.

 

Nitrogen, for the most part, is a gimmick. True, your pressure won't fluctuate as much with temperature (it still will though). But, I've seen people advertise nitrogen inflated tires as increasing MPG. This is simply not the case, as long as your tires are properly inflated, with air or nitrogen, you will get the best mpg's. If you have free and easy access to nitrogen it is better. Its what we service aircraft components with at work.

 

Filled them today. They're at 37. Tire sensor is gone now.