I just purchased a Ram 3500 DRW. VERY excited about it, however, this is my first experience with DRW and I had some questions about those inside tires.First, what method are you all using to fill them up? I plan on just getting a long rigid inflator to push into the inside valve stem. One with a gauge so I can easily check pressure while filling. I've seen other options that extend the valve stem or even tied the two tires together with a metal air hose.What do you all think about those?Second, I was reading that since the inside tire carries more weight than the outside tire it heats up more resulting in a higher PSI thereby making it more stiff than the outside tire causing the inside tire to wear faster. It was suggested to run 2 or 3 PSI lower in the inside tire to account for this. Thoughts??I can find this easily enough but while I'm here...how do you rotate 6 tires?

Never had an issue airing the inner tire or checking the pressure. My inflator is about 10 inches long and my air gauge is quite long also. Size does matter. My door jam sticker says 65 psi rear and that's what I keep in all four tires. There is 3,500 lbs on the pin and the tires are wearing great, all of them.

Hi,All the tires carry 'about' the same weight. Now the outside passenger side tire can sometimes sit out in free air, when you are 'really close' to the shoulder of the road. I have also watched a big rig towing a 45' trailer, and get to close to the curb, and put the outside dual tires on a curb, so that the inside tire was up in the air, over the hitch.The dual tires are rated for less than the normal weight rating of a 215/80R16 tire. I think that mine are rated at 2700 single and 2,450 dual, or 4900 total for each side. Probably you will not have more than about 2,000 pounds per tire, except for extreme towing. . .Fred.

Second, I was reading that since the inside tire carries more weight than the outside tire it heats up more resulting in a higher PSI thereby making it more stiff than the outside tire causing the inside tire to wear faster. It was suggested to run 2 or 3 PSI lower in the inside tire to account for this. Thoughts?? I can find this easily enough but while I'm here...how do you rotate 6 tires? Keep tire pressures equal across the four rear tires. They will wear better. As far as rotating tires the owners manual has a nice picture of how to rotate a dually's six tires. However, you may find that many dually owners never rotate if the tires are wearing equally.

Hmmm, 50 years around trucks and I never heard of running different psis in the duals. It IS important to keep them the same psi and rotate so you have the same diameters. The reason a tire with duals on a truck burn up is cuz it ran low and the low one can heat up til it catches fire... just saw a couple of tour buses on the news with tires on fire. The low psi tire is being drug across the road and that's what creates the heat. You NEVER see the full tire burn up on duals. It's always the low one cuz it's dragging and getting the friction. BTDT! I have an inflator that has a straight connector on the end, for the inside dual. The angled back connector is for the outer dual. I put 2" stems on my tires and that's JUST long enough to get the inflator on. I retrofitted my old Chinese truck tire inflator with one of my refrigerant compound gauges... 1% accuracy. Craig

Questions about DRW tire pressure | Good Sam Community

Troy35
Explorer
May 12, 2015
Still looking good! I will try what you are running. Thanks
Cummins12V98
Explorer III
May 12, 2015
I ran 80 front all the time 45 rear solo and 60 loaded with 5K pin on my 11 RAM LongHorn Dually. At 40K the tires looked great. Only rotated fronts side to side. My 15 I am running 80 front all the time 40 unloaded and 60 loaded rears.

Pic of MS2's at 40K.
Troy35
Explorer
May 12, 2015
Ok, good advise thank you!
C_Schomer
Explorer
May 12, 2015
Hmmm, 50 years around trucks and I never heard of running different psis in the duals. It IS important to keep them the same psi and rotate so you have the same diameters. The reason a tire with duals on a truck burn up is cuz it ran low and the low one can heat up til it catches fire... just saw a couple of tour buses on the news with tires on fire. The low psi tire is being drug across the road and that's what creates the heat. You NEVER see the full tire burn up on duals. It's always the low one cuz it's dragging and getting the friction. BTDT! I have an inflator that has a straight connector on the end, for the inside dual. The angled back connector is for the outer dual. I put 2" stems on my tires and that's JUST long enough to get the inflator on. I retrofitted my old Chinese truck tire inflator with one of my refrigerant compound gauges... 1% accuracy. Craig
jmtandem
Explorer II
May 12, 2015
Second, I was reading that since the inside tire carries more weight than the outside tire it heats up more resulting in a higher PSI thereby making it more stiff than the outside tire causing the inside tire to wear faster. It was suggested to run 2 or 3 PSI lower in the inside tire to account for this. Thoughts??

I can find this easily enough but while I'm here...how do you rotate 6 tires?

Keep tire pressures equal across the four rear tires. They will wear better. As far as rotating tires the owners manual has a nice picture of how to rotate a dually's six tires. However, you may find that many dually owners never rotate if the tires are wearing equally.
Golden_HVAC
Explorer
May 12, 2015
Hi,

All the tires carry 'about' the same weight. Now the outside passenger side tire can sometimes sit out in free air, when you are 'really close' to the shoulder of the road. I have also watched a big rig towing a 45' trailer, and get to close to the curb, and put the outside dual tires on a curb, so that the inside tire was up in the air, over the hitch.

The dual tires are rated for less than the normal weight rating of a 215/80R16 tire. I think that mine are rated at 2700 single and 2,450 dual, or 4900 total for each side.

Probably you will not have more than about 2,000 pounds per tire, except for extreme towing. . .

Fred.
azdryheat
Explorer
May 12, 2015
Never had an issue airing the inner tire or checking the pressure. My inflator is about 10 inches long and my air gauge is quite long also. Size does matter.

My door jam sticker says 65 psi rear and that's what I keep in all four tires. There is 3,500 lbs on the pin and the tires are wearing great, all of them.

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