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Standard tire pressures for my 2019 F350 dually are 75 front and 65 rear. I find that this also provides just the right amount of understeer for non-towing highway driving. For those of you with an F350 dually TV, what rear tire pressure do you recommend for towing? Max cold tire pressure is 80lbs for my stock Michelin 17" LTX M/S2 Highway Tires. I expect the pin weight for my fiver to come in somewhere between 3000 - 3500 lbs so rear GAWR should not an issue.
Hans
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2019 NH Summit 37IK3S
2019 F350 King Ranch Dually w/ Air Lift Air Ride, 50 gal TransferFlow Aux Tank
Fulltime Class of 2019
'I'm too old to be wrong, but I could be wrong about that.'
The recommended pressures are the ones that provide the proper tire pressure for the rated load of the truck. Assuming you are not overweight on any axle (like the rear axle) then use the recommended cold inflation pressures of the manufacturer. That's what I have been doing for the last 3 years of full timing. The reason the rear tires are only 65 psi is that there are 4 of them ... each one carries 1/2 as much as a SRW so the pressures are lower.
-- Edited by RonC on Saturday 23rd of February 2019 02:34:56 PM
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Ron and Janice
2016 Ford F350, King Ranch, DRW, 4x4, CC, 6.7 PS Diesel, remote control air lift system
2017 Durango Gold 381REF, Lambright furniture, MCD shades, morRYDE IS, 8K Disc brakes, GY G114 LR H Tires, 27,320 lbs CGVW
The recommended pressures are the ones that provide the proper tire pressure for the rated load. Assuming you are not overweight on any axle (like the rear axle) then use the recommended cold inflation pressures of the manufacturer. That's what I have been doing for the last 3 years of full timing. The reason the rear tires are only 65 psi is that there are 4 of them ... each one carries 1/2 as much as a SRW so the pressures are lower.
Thanks Ron, it's what I had assumed but wasn't sure how the 65 lbs of pressure panned out in actual towing experiences. I noticed from your signature that you also had a remote rear air suspension system installed. How is that working out for you with your fiver?
Hans
__________________
2019 NH Summit 37IK3S
2019 F350 King Ranch Dually w/ Air Lift Air Ride, 50 gal TransferFlow Aux Tank
Fulltime Class of 2019
'I'm too old to be wrong, but I could be wrong about that.'
Weigh your rig loaded and unloaded. Rears add 5psi and fronts add 10 psi to that the load/inflation chart specifies for your specific tire size and load range.
I run 80 ALL the time on the fronts and rotate them side to side leaving the wheels in the same position and keeping the tire rotation the same. I NEVER rotate the rears and run them at 65 loaded as I tow at full RAWR. I run 35psi BobTail for a mUCH nicer unloaded ride.
Weigh your rig loaded and unloaded. Rears add 5psi and fronts add 10 psi to that the load/inflation chart specifies for your specific tire size and load range.
I run 80 ALL the time on the fronts and rotate them side to side leaving the wheels in the same position and keeping the tire rotation the same. I NEVER rotate the rears and run them at 65 loaded as I tow at full RAWR. I run 35psi BobTail for a mUCH nicer unloaded ride.
Thanks for rotation suggestions. I took a look at the Michelin Truck Tire Data Book and on page 24 found the dual load/pressure data for the LTX M/S2: 2910lbs @ 80psi. My F350 rear GAWR is listed at 9900lbs. Interestingly, the ratio of the rear GAWR to the combined max load rating of the four rear wheels comes to 9900lbs/11640lbs or .8505. If I multiply the tire's max cold air pressure (80lbs) by this ratio I get 68lbs. So, rounding off brings the calculated rear tire pressure to the 65lbs listed on the vehicle plate. My original question was more about how this rated max pressure worked out for actual towing and it appears from both answers that 65-68 lbs would be this rear tire's max pressure on the F350 dually.
Hans
__________________
2019 NH Summit 37IK3S
2019 F350 King Ranch Dually w/ Air Lift Air Ride, 50 gal TransferFlow Aux Tank
Fulltime Class of 2019
'I'm too old to be wrong, but I could be wrong about that.'
The recommended pressures are the ones that provide the proper tire pressure for the rated load. Assuming you are not overweight on any axle (like the rear axle) then use the recommended cold inflation pressures of the manufacturer. That's what I have been doing for the last 3 years of full timing. The reason the rear tires are only 65 psi is that there are 4 of them ... each one carries 1/2 as much as a SRW so the pressures are lower.
Thanks Ron, it's what I had assumed but wasn't sure how the 65 lbs of pressure panned out in actual towing experiences. I noticed from your signature that you also had a remote rear air suspension system installed. How is that working out for you with your fiver?
Hans
The rear air suspension is there to level the truck and 5er. When I put the pin weight on the rear axle, the truck sags just a bit ... pumping up the air bags brings this back up to level. I like it a lot ... it also keeps the springs off the overloads (which are VERY STIFF) so the ride on the rig improves.
__________________
Ron and Janice
2016 Ford F350, King Ranch, DRW, 4x4, CC, 6.7 PS Diesel, remote control air lift system
2017 Durango Gold 381REF, Lambright furniture, MCD shades, morRYDE IS, 8K Disc brakes, GY G114 LR H Tires, 27,320 lbs CGVW
The recommended pressures are the ones that provide the proper tire pressure for the rated load. Assuming you are not overweight on any axle (like the rear axle) then use the recommended cold inflation pressures of the manufacturer. That's what I have been doing for the last 3 years of full timing. The reason the rear tires are only 65 psi is that there are 4 of them ... each one carries 1/2 as much as a SRW so the pressures are lower.
Thanks Ron, it's what I had assumed but wasn't sure how the 65 lbs of pressure panned out in actual towing experiences. I noticed from your signature that you also had a remote rear air suspension system installed. How is that working out for you with your fiver?
Hans
The rear air suspension is there to level the truck and 5er. When I put the pin weight on the rear axle, the truck sags just a bit ... pumping up the air bags brings this back up to level. I like it a lot ... it also keeps the springs off the overloads (which are VERY STIFF) so the ride on the rig improves.
I'm hoping that my rear air suspension works as well as yours. Haven't had the chance to try it out yet.
Hans
__________________
2019 NH Summit 37IK3S
2019 F350 King Ranch Dually w/ Air Lift Air Ride, 50 gal TransferFlow Aux Tank
Fulltime Class of 2019
'I'm too old to be wrong, but I could be wrong about that.'
