Inflation guidelines for towing? (RAM 3500)

Same as mine..Ram show this air pressure rating to make sure that those who are too lazy to air up when towing, or don't bother to read their owners manual will be at towing pressure when they tow...80 psi for the front's work well and I personally fill 4 rear tires to 65 because it works for me...tires wear great and my empty weight driving is fine..some who think ride is a little rough will air their rear tires to 45 50 psi...then when towing go back up to 65 psi..you can't go wrong following the recommendations.,,If you think no load riding is a little rough, air down rears, but I'd leave fronts aired to 80 psi.

2016 Dually has same psi recommendation..80 front, 65 rears


Jim

Check the RAM and/or tire manufacturer web site.

scrubjaysnest wrote:
Check the RAM and/or tire manufacturer web site.

The tire manufacturer will recommend what truck manufacturer's door placard states.. The truck manufacturer will ask what your door placard reads..That's what they'll go with. I know, I've had conversations with tire both tire manufacturer about it, General and Nexen.

Jim

There is something called a load based inflation index. Based on actual weights, it will suggest tire pressure. Remember that overinflated tires not only give you a rougher ride than needed but may not grip the road as well at over pressure.

Bedlam wrote:
There is something called a load based inflation index. Based on actual weights, it will suggest tire pressure. Remember that overinflated tires not only give you a rougher ride than needed but may not grip the road as well at over pressure.

Agree, BUT, once the placard is placed on your door pr jamb, the manufacturer won't budge off that, nor the tire manufacturer disagree with the vehicle manufacturer..BUT, the tables are there to be used and they're the owners tires..I've had best luck with dually tires for wear over the last 11 years by running at manufacturers recommended air pressure, but that's based on my own personal experience.

Having worked in the auto tire industry as an engineer for a short time....the tire is NOT considered "over inflated" if it is inflated to sidewall max pressure..The front tires are filled to max sidewall pressure,(80 psi), but rears are only filled to 65 psi..(max sidewall psi, again, 80 psi

Sometimes when working more with trailers, the load tables are more proficient with tires and air presses as opposed to one's pick up truck...but..not my truck, nor my tires.

Not sure if you were asking a question or not?

Always run 80psi front tires! Rears solo 40psi. Loaded heavy as I am 65psi rears but if your pin is lower use inflation/weight chart for your tires and add 5psi to what the actual load requires.

I just wonder what changed Ram's inflation guidelines for the rears :H I realize the truck itself has gained some weight. Stock DRW is about 9k now compared to my 06 that was 8K. That equates to 166 lbs per tire which requires a extra 25 lbs per tire :S
What is it that makes 65PSI for a empty truck bed correct now compared to 10 years ago empty truck needing only 40PSI :h :h
Something tells me a suit from the legal department changed the inflation pressure. Most likely someone did forget to air up before towing heavy and Ram heard about it.

A lot could have changed. The brand, model, and size of tires installed from the factory are the most likely changes. The weight distribution of the truck. Who knows what else. I wouldn't go by the vehicle manufacturer's inflation recommendation anyway, that would only apply to the factory tire. I'd go by the table from the tire manufacturer of the tires that are actually on the truck.

45Ricochet wrote:
I just wonder what changed Ram's inflation guidelines for the rears :H I realize the truck itself has gained some weight. Stock DRW is about 9k now compared to my 06 that was 8K. That equates to 166 lbs per tire which requires a extra 25 lbs per tire :S
What is it that makes 65PSI for a empty truck bed correct now compared to 10 years ago empty truck needing only 40PSI :h :h
Something tells me a suit from the legal department changed the inflation pressure. Most likely someone did forget to air up before towing heavy and Ram heard about it.

You pretty much nailed it Rick.

I've always heard 80 PSI is the recommended, loaded tire pressure (front and rear) for all late model Ram 2500/3500's.

Just checked the door jam sticker on my 2016 Ram 3500 CC SB Cummins. 60 PSI for the front tires, loaded?