Can you still tow with D rated tires at 50 PSI?

[California_RAM]

I am opening up a question to the forum. I need your help in better understanding the consequences of installing the AEV dual sport lift on my 2015 Power Wagon Tradesman. A very strong appeal to me for the lift is the ability to run 37" D rated tires at 50 psi (measured cold pressure). This combined with the 5160 Bilstein shocks, and 37x12.5R17 tires should provide a more comfortable ride on/off road. Additionally, the kit provides the Procal chip to correct the speedometer and TPMS tire sensors.
The question is: Can you still tow when your max D rated tire pressure is 50 PSI? The Ram door panel lists the recommended tire pressure as 60psi (front), and 65psi (rear). Although the procal corrects the tire sensor light, will I be underinflated for towing? I tow a 30' Airstream, which absolutely worst case could weigh 9,000lbs (usually around 8,000lbs w/gear and clothing).

I appreciate your feedback. I have already purchased the MOPAR regular 2500 gas coils for the lift. I want the D rated 50psi squish, but am concerned that I need the E rated tire, and the rough 65psi that comes with them. is there something that I am missing? I will include pictures below.

[loveracing1988]

I have mastercraft courser mxt's on my non pw 14 2500. I never towed with it with e rated tires but I have with these. I set them to 35 psi rear and 50 psi front when not towing to make sure the entire tire touches the ground. When we re-did a retaining wall I put 50 psi in the rear to haul and tow. I had a max of 3500 pounds of limestone in the bed and there might have been a little more squirm but not much, no enough to ever be considered unsafe. I also towed a mini excavator that weighed around 9k with the trailer and had zero issues with that as well. I think if you go into it knowing what you have you will be fine. If you are going to be towing a lot though I would jump up to a load range E tire just for piece of mind, but for once a month towing I wouldn't worry about it.

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[Will]

The load rating of the tire is what counts, not the psi. Some hold more with the same psi, some hold less... a more ply tire will have better overall stability but the bigger tire will hold the weight just fine.

[OffroadTreks]

The load rating of the tire is what counts, not the psi. Some hold more with the same psi, some hold less... a more ply tire will have better overall stability but the bigger tire will hold the weight just fine.

What he said check the load rating.

[coder]

The risk is, during heavy towing or hauling, over heating the tires and causing a blowout because of excessive sidewall flexing not worth it for 10 psi difference IMO. For driving unloaded it would be fine.

[nts007]

The risk is, during heavy towing or hauling, over heating the tires and causing a blowout because of excessive sidewall flexing not worth it for 10 psi difference IMO. For driving unloaded it would be fine.

If you are running much lower than the >tire< rated psi then yes.

D or e rating makes little difference aside from being an old way of rating tires but is a quick reference. The load index rating can be higher on d rated tires than e rated based on tire size. And!! Not all d rated tires are 8 ply. Some are 9 and 10 ply. A 37" d rated tire has a higher load index than a e rated stock size tire.
Now for the towing question.. The rating and psi will not affect you. Your side wall height is going to be your factor. I tow a ton with 37-12.5/17 and don't have issues. You will notice a bit more squirm but nothing dangerous as long as you are inflated to the tires max rating. Do not overinflate. If you compare your 37's to stock size towing well... Stock will win hands down. That's what the truck is designed to tow with. Far more at play with towing than tire pressure. Your entire drive train has been altered with the larger size tire as per oem spec. That's a whole different situation.

Yea you can tow with your 37's. Inflate to tires max psi (50) and go. Do not go by door sicker. It no longer applies to you.

[California_RAM]

Thank you for your response. The outside perspective was extremely helpful.

[scoutermike]

Just a quick reference. My 2016 PW came with the stock 285-70R17 Duratrac tires which have a 65lb. max. I replaced them with 315-70R17 Duratrac tires with the identical weight rating. They have a max of 50lbs. Same tire, just the next size up.

[israelstanage]

Manufacturers have load range tables that state the max load at different pressures for every tire they make.

Toyo/nitto link:

https://www.toyotires.com/tires-101/tir ... ion-tables

[TwinStick]

My PW came with D rated tires. I still have them & they are still on the truck. I towed a 10,500 lb camper for 7 years with my stock BFG A/T's. It was a little squishy ( meaning side to side movement ). No blowouts, no issues. But my D's say 65 psi on them. I ran them at 65 when towing. With our new 3500 lb camper, it really don't make a difference, but I will still prolly go E-rated.

[California_RAM]

These are the tires that I ended up going with. D rated, Toyo Open Country R/T (37x12.5R17). They ride great. I commute with approx. 49 psi all around. I have not towed yet, but do not anticipate any problems.