Tire PSI

[SShafranko]

Just want to get some idea of what psi everyone is running in the winter and summer. I think mine is too high. I almost get air when i hit a bump.

 

[Okie-Go]

I have a dually so it will be different! I try to keep 65 in the front and 42 in the duals. Of course this is empty, go up to 55-60 in the rear with a load depending on weight.

 

[donnier]

I try to keep 50# all the way around.

Bump the rears to 70 when towing.

 

[DeezelDood]

Ditto. 50 all around, but 60 front and 70 rear towing. The WD hitch shifts the load to the front end a bit. Door panel spec calls for 50 front and 40 rear when light. I keep the rear at 50 so I don't need to add air when I grab a load of hay. If I haul anything heavy I add air to the rear. The ride, when empty, at the lower pressures is much better. My original tires, properly rotated, show even wear at 40k+ miles.

 

[THorn]

60 upfront, 55 in the rear. I found that my tires wear the best (or least) at this pressure. I am sure its a little different for everyone. Keep in mind dropping pressure may result in a better ride, but will hurt mileage.

 

[Grizzly]

On my DRW, I keep 65 psi on front tires all the time. For the rears I keep 45 when empty and 60 when towing the 5er. When I towed the Lance Camper (now sold) I kept 70 on the rears.

 

[SShafranko]

I think i have to lower mine. I have 65 front 60 rear. Feels like a backhoe. Thanks a lot.

 

[hearingyourlies]

I'm running 45 up front and 35 in the back. When I throw weight in the back I bump the rears anywhere from 55-75 and the front up to 55.

 

[Grizzly]

I'm running 45 up front and 35 in the back. When I throw weight in the back I bump the rears anywhere from 55-75 and the front up to 55.

If you have the Cummins engine you should run about 60/65 psi on the front tires. On the rear tires, 35 psi seems too low even without a load.



You may want to show your signature.

 

[HSpiering]

I agree, 65 front with E-rated only. A diesel is to heavy. 50-65 rear with load weight. I got some tires from Les Schwab. They wanted 45 for good ride 6ply . I got wash board in no time.

 

[mberry]

I run 70 in the front and 65 in the rear tires. Empty most of the time. It does yield slightly better mileage and the ride is still way better than my '02 ever was.

 

[SShafranko]

I lowered my fronts down to 55 and rears to 50. What a difference! Probably loosing 1mpg. Is 55 too low for the front? It might be pushing it i guess.

 

[jelag]

Okie-go

Your 42 psi rear might be too low and allow for side wall flex and tire over heating... Go to the tire's mfg. web page... and check the specs... under inflation and side wall flexing is the problem Firestone had with Ford... . once the tires flex and overheat inside damage makes them un-safe. . I'd hate for a TDR member to have tire failure and the possible accident...

Higher pressure will improve fuel economy as well...

 

[rbattelle]

Since I bought my truck I've been gradually increasing the front tire pressure. I'm currently running 60 lb (having started at 50 lb back in 2003).

As others have stated, the front axle is loaded all the time (4700 lb front axle weight on mine), so higher pressure is better.

Ryan

 

[thashane]

65 fronts, 50 rear with Procomp AT's. Bump up to 75-80 depending on severity of load. What I've heard is that the tires have been rated at their weight rating at the maximum psi (80 for my pcomps) so I try to run them at that when I feel I may be approaching the weight range. Just wish there was a better pump on the route that I'm usually loaded on, cuz I generally have to push the air compressor button at gas stations once for each tire

 

[Okie-Go]

Jelag,

Thanks for the info. I might bump them up a bit. From the wear on them it seems like the edge of the tire is not even hitting the ground. I am trying to keep from wearing out the center of the tire. I need to look at what it says on the sticker on the door jam. I can't recall what it says.

 

[hearingyourlies]

I'm running 305/70-17 E rated Nitto's .



At 35# they are rated for 2800 lbs. 45# IS 3100-ish. At 65 they are 3640.



I've got approx. 22k miles on them and that's about half tread life.



Doesn't ride well, but sure doesn't ride as bad as it did at 65.

 

[LRutigliano]

I run my fronts and rears at 70psi, non towing.



fronts at 70psi, rear at 80psi when towing.



I don't deflate the rears very much when not towing because its takes forever to get them back up to 80psi even with my industrial air compressor.

 

[boomchadda]

Just want to get some idea of what psi everyone is running in the winter and summer. I think mine is too high. I almost get air when i hit a bump.

I get some serious air when I do a bump!! LOL!

 

[Jeremiah]

I think i have to lower mine. I have 65 front 60 rear. Feels like a backhoe. Thanks a lot.

I run 85 lbs front and rear solo, but that's because I have 19. 5" wheels and 245 x 70 Hankook tires. The tires are commercial with 4-ply tread and 1-ply sidewalls. The wheel/tire/air pressure combination makes for a great ride and tremendous handling. Much better than OEM. There is more wear in the center of the tread, which means I could back off the pressure and probably improve everything except fuel mileage. But I sure like what I have now.