Ive been gone for 7 months on a deployment and on r.r right now...i forgot what the tire pressure needs to be on these 37s... before i left i was running 35 grapplers and i was running those at 40psi and just wondering what i should be running them at now. I just got an oil change and they had all four tires at different psi ranging from 43-55. Trying to get a good psi so the tires wear evenly and have a good wear pattern
You should be able to run them somewhere around 40. Don't go much lower than that, not lower than 35, and then only if empty. You should not need to go more than 45 for anything you can load in the truck. But I would start at 40.
ok ill start there but would it make a difference that my 35s mud grapplers i was running at 40psi as well. I mean it says no more than 50psi max so running 40psi wouldnt hurt. Prob have a better wear pattern too
i ran my TSL's at 18-22 PSI and had 35k miles before i sold them.
my Ground Hawgs im running at 15-20 PSI
with a tire like Nitto Mud Graps id run them lower than normal. i think 40 PSI is alittle high. 30 PSI might waste alittle more fuel but they will ride better!
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The problem with running too low is that at highway speeds they build heat. Which can cause tread separation and blowouts. Always better to be a little high than low.
I've always had great luck with 40 psi in truck tires.
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The problem with running too low is that at highway speeds they build heat. Which can cause tread separation and blowouts. Always better to be a little high than low.
tires build heat no matter what air you have in them.
more heat = more air expanding. this is why you are supposed to drop air out of tire before a long trip. run them at the max then make a long trip and take the pressure it will be higher alot higher 10PSI or more.
ive ran all my mud tires low PSI like this for years, never have had a problem.
if 30 PSI causes tread separation then you have a bigger problem. 40 PSI is ok but MUD graps have a tendency to crown anyway so id run them and avoid that.
i cant remeber the last tire that i ran more than 30 PSI in probably my BFG TA KO's
All I can say is you have been lucky. Every tire manufacturer and company that sells tires warns about running too low a pressure.
Remember the Explorer problem. Too low a pressure.
All I can say is you have been lucky. Every tire manufacturer and company that sells tires warns about running too low a pressure.
Remember the Explorer problem. Too low a pressure.
you are compairing MT's to street tires. they arent the same. The tires you are comparing a tire that is driven at 80+ MPH regularly. And a set of mud tires that arent even rated to 85 MPH.
MAJORITY of blow outs are results from idiots running a tire without ever checking it, people run them with metal belts showing. Under inflation and over inflations is a small percent of the reason people have blow outs. Another big factor is guys that will put P rated tires on a truck then hook their boat or trailer to it and POT, ive seen it. Theres way more instances of blow outs from manufacturer flaws then pressure flaws.
I had an Exploder when they were having the tire issues, no problems with mine.
you are arguing facts between to COMPLETELY different type of tires.
If that is the case, then there is no reason for them to have a max pressure of 50, 65, or 80. The only tires that should be run that low is low pressure tires. Or in the case of running on sand. Then as soon as you get back on the road, you re-inflate. MT are no different than an AT except for tread pattern and compound. The use the same construction method as an AT tire. And LT tires themselves are not speed rated. Which is part of the reason light trucks have a speed limiter.
If you are so sure of your info, give us links.
Last edited by kingfish51; 07-04-2009 at 05:07 PM.
If that is the case, then there is no reason for them to have a max pressure of 50, 65, or 80. The only tires that should be run that low is low pressure tires. Or in the case of running on sand. Then as soon as you get back on the road, you re-inflate. MT are no different than an AT except for tread pattern and compound. The use the same construction method as an AT tire. And LT tires themselves are not speed rated. Which is part of the reason light trucks have a speed limiter.
If you are so sure of your info, give us links.
PS, the Terra Grappler is not a MT, it is an AT. The Trail Grappler is a MT tire.
who's compairing a MT to an AT im saying you are compairing an MT to a Passanger tire. (the links you posted is about P rated tires not LT tires)
and what are you talking about the terra grapplers for, Mhockey has Mud Grapplers thats an MT,
i dont need to post links, i work with the stuff everyday.
no ill give you it, if you are gonna be driving at high speeds REGULARLY then yes get the PSI up alittle but i dont know too many people that cruise around in their lifted truck at 60+ MPH. My truck barely ever goes over 65 MPH, There no need to go that fast when you have 125#s rolling on all for corners.
My methods are for slower speeds, (o-50 MPH) i garuntee you wont have any problems at this speed with the PSI i recommend.
learn more about the tires you are talking about before you come here and tell me that terras are an AT, thats obvious and pointless in this discussion seeing how the tire in question is the Nitto Mud Grappler (MUD TERRAIN
Those links are about any tire you want to put on the road. Not specialty tires for rock crawling or mud hole racing. They are for tires put on the highway. Again, the pressures listed on the tire are for the max carrying capacity of the tire at that pressure. At half pressure, capacity is at best half that weight.
If the tire did not need 50, 65, or 80 did not need that pressure for that weight, it would not be on the tire.
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