Off Roading SS TRXUS M/T-What tire pressure?

[greyghost]

Yet another thread about Tire Pressure. I recently bought Super Swamper TRXUS M/T's in hopes of finding a very aggresive tread in an "E" rated tire. By reading other threads about the Interco tire it seems the trick to getting every mile from the tire is watching the tire pressure. But what I didn't find is what tire pressure seemed to work the best.

So I went on another search to find this elusive # and have found alot of info from drawing chalk lines on the tire to some good math calculations.

I drive 60% on highway and the other time is spent in hay fields and 4X4 trails. I do haul (10k plus) but I will correct for that later.



So those of you running Super Swampers radials (TSL, SSR, TRXUS STS,M/T..... ), what pressures are you running?



4300 lbs on the front axle

3300 lbs on the rear axle

3745 max load rating (single) "E"

80 PSI max inflation pressure



46 in the front tires

36 in the rear tires



These pressures seem extremely low and would create a lot of heat in the tire. My gut feel is to run 70 PSI in the front and 50 in the rear when the truck is emtpy.



Thanks in advance for the help



Garrett

 

[XJSuperman]

I don't run these tires BUT I sure wouldn;t run pressures that low unless I was offroad or for short distances to and from the trails.



I would treat them like any other E-rated tire... I run 72 PSI on my front mich. (crap tires) and about 68 or so in the rear.



Truxus MT's are a different animal from most super swampers as they are not bias ply... they are radials... sure they have thicker sidewals compared to BFG, GY, etc... BUT they are still radials and should be treated as such.

 

[greyghost]

Thanks XJ, I appreciate the advice.

 

[SMorneau]

Tires produced in standard sizes are suppose to be aired up according to the weight load that is on the tire and speed. You can find the chart, which is independent of manufacturer, buried in a PDF document at the Goodyear website. I have been going by the pressures on the chart for a few years and have convinced a few others to do this as well. We are all getting nice even tread wear, better traction and ride due to running correct pressures not overinflated tires.



My puny 255-85 R16 tires are run at 53 in front and 35 (the minimum) in the rear. bigger profile tires should require even less. The ratings progress the same on a size basix independent of load range rating, just the maximum pressures/load ratings are different.



If you are in doubt contact your tire manufacturer. I highly recommend using the chart.



Scott

 

[TKingsbury]

I have 35" BFGs and I run 40psi front and 33 psi rear when empty. Any more pressure in the rear and the tread isn't flat on the ground.

Travis. .

 

[greyghost]

SMorneau,

I went to Goodyear's site and found a 19 page doc on Tire Inflation. I'm guessing this is the doc you are referring to. I'm in the process of reading it. It does have a worksheet and formula for tire pressure. I think I'll give it a try and see.

I did talk to a guy at Interco before buying the tires, he was very reluctant to give me info on what tire pressures to run. He was having a "liability" issue. I also asked the place I eventually bought the tires from, they suggested running 65 to 70 PSI in the front and 50 to 60 PSI in the rear. If the ride is too soft increase them both by 10 PSI. Watch the tread wear making sure not to run the centers out. But he admitted, he’s not the one to ask, he’s a Jeep owner and a rock crawler. He did point out IRV.com or something close to that, commenting that they may have a better idea what to do for pressure and tread life.



TKingsbury,

Thanks for your input. Seems the trend is to run lower pressure and only what is needed (don’t inflate to max or over inflate).



Still would like to hear from guys who have run or are currently running a set of SS TRXUS M/T or STS radials.



Garrett

 

[Oasis-3]

Trxus MT Psi.

I have run 3 sets of 285's and found that 60 Psi. worked best for me.

Now I am running a set of 34 X 12. 5's and am running 55 Psi in them and so far so good.

As you can tell I like the Trxus MT tires they are cheep and you don't get stuck :-laf

Good Luck

Cliff

 

[y-knot]

I run all my tires at the max allowed air pressure for the fronts and 50 psi in the rears. I have both BFG MT's and Trxus M/T's, the BFG's hold 65psi as a max and the Trxus are only 55 psi if I remember right, I know they are less then the BFG's. I run the BFG's in the winter and the Trxus in the summer, both have great traction, but I have the Trxus tires on the Alcoa wheels which hate salt, so they are summer tires. These trucks are just too heavy to run less then the maximum allowed air pressure in the front. I have noticed better handling and much better tire wear with this set-up. In the rear, I can leave them at 50psi even with a 3800 lb pin weight, the ride is smoother with a little less air pressure in the rear. I have a dually so this may or may not work for you? I suspect with a single rear wheel, you may need a little higher rear tire pressure?

 

[greyghost]

Oasis-3,

3 sets. wow. I just stumbled on to them a couple of months ago. Really like the 10 ply "E" rating at 80 psi. They are stiff legged little suckers at max inflation. I almost went with the 35's but figured I'd try the smaller 285's first to see if I liked the way they handle. Currently running 65 psi in the fronts and 50 in the rear. They still have all the nubs after 250 miles, 50 miles of which were hay fields, and axle deep mud. Never had a tire that dig like these. Thanks for the advice.



Garrett

 

[greyghost]

Y-Knot,

A dually with mudders, thats a no-nonsense work truck. Thanks for the info, I've had the tires at 45 to 80 psi in the front. Seems to ride and handle good at any of those pressures. I picked 65 since it seems to be the middle of the road with all the info I've received lately. Thanks again.



Garrett

 

[Greg Boardman-RIP]

I have 37" Goodyear MT/R's and I always run 25 psi. They are a 10 ply radial tire.

 

[y-knot]

This is a shot of the Trxus 255-85-16's on Alcoa Hot Shot wheels.



#ad




#ad




#ad






MY WORK TRUCK

 

[greyghost]

NICE! Very cool Y-Knot, nice touch with the 3rd gen badging too.



Garrett