Recommended Tire Pressure 315/75/16

[Graham2990]

Just picked myself up a set of Goodyear Duratrac 315/75/16's this afternoon.

I've only got about 30 miles on them, but I'm very pleased so far.

Dramatically changes the look of the truck, and I actually believe the ride to be a bit smoother with some more contact surface and meat on the ground compared to the 265's I had previously.

I've searched and seen where others have recommended a pressure of around 18PSI for off road use, but I'm curious to know what others experience has been regarding a pressure for street use.

I double checked my lug nut torque when I got home and check pressure also. Each tire was sitting at 45PSI and I backed down to 38PSI.

I'm going to try experimenting for a few days to see what works best, but I'd like to get the best life out of these tires as possible by running at proper PSI.

New Meats:



Old Meats:

 

[Renagade132]

Yes I can see a big difference. I think what your using is a good average psi for now, like you said, feel it out, because everyone pressure is different when it comes to modified trucks, tire, rim, hell even the valve stem and cap used can make a difference! So as you drive it, just adjust it based on hard ride, soft ride, etc

 

[chaos254]

Duratracs are awesome. I found that 45 psi works the best for me

 

[rsc]

45 psi? Wow, I didn't even run that much in my 33" Duratracs! I would run 41-42 psi. On my 35" Kelly Safari TSR's I run about 37-38 and its the same carcass.

 

[Highatop]

I run my 315 Duratrac's at about 35lbs an about 16-18 when wheelin on rocks. Moab rocks, anyway. Also, depends where I'm wheelin. Here at home in the mtns 20-25. Good luck

 

[06 H3]

Damn when I had duratracs I ran 35 on the street 12-13psi offroad

 

[Highatop]

Damn when I had duratracs I ran 35 on the street 12-13psi offroad

Wow, I hate drivin over 30mph aired down when headin to the trails in Moab. How long did your tires last? I was taught w/ that low pressure, wears out your tires a lot faster...

 

[rsc]

12-13 allows good tread contact, 18 is about the most you should run if you want to have the sidewall flex and have a good contact patch. Above 20, why even bother?

 

[SedonaBound]

One DIY method for finding the right pressure that I've used is chalking:
- Use a soft chalk block, e.g. for chalk lines.
- Overfill tires but stay well under the max pressure stamped on the sidewall.
- Find a parking lot with clean smooth pavement and near an air source.
- Rub a heavy chalk line across the entire tread width on one tire and drive 100 ft or so.
- The chalk line should be thin or gone in the center of the tread because its over-filled; reduce pressure by just a few pounds. Rechalk & repeat until the chalk line wear is uniform across the full width (if the chalk line is thin or gone at the edges only, you need to add air and retest). Record the resulting pressure.

Test F & R on the driver's side and you'll get the PSI pretty close to optimum psi for light loads all around. I add 10%. Adjust the pressure for heavy loads using vehicle wgt and payload wgt figures.

 

[Graham2990]

One DIY method for finding the right pressure that I've used is chalking:
- Use a soft chalk block, e.g. for chalk lines.
- Overfill tires but stay well under the max pressure stamped on the sidewall.
- Find a parking lot with clean smooth pavement and near an air source.
- Rub a heavy chalk line across the entire tread width on one tire and drive 100 ft or so.
- The chalk line should be thin or gone in the center of the tread because its over-filled; reduce pressure by just a few pounds. Rechalk & repeat until the chalk line wear is uniform across the full width (if the chalk line is thin or gone at the edges only, you need to add air and retest). Record the resulting pressure.

Test F & R on the driver's side and you'll get the PSI pretty close to optimum psi for light loads all around. I add 10%. Adjust the pressure for heavy loads using vehicle wgt and payload wgt figures.

Good info. Looks like I'll be hitting the dollar store this weekend to see if I can find some playground chalk.

 

[zackcrum]

Sorry the darkness was bothering me. It looks great! Once my truck is back on the road tires will be next and I think I'm gonna make the same choice as you

 

[Graham2990]

I've been pleased with them so far. I'll let you guys know how they hold up. I ended up paying $305 per tire mounted, balanced, with a road hazard warranty from discount tire. Didn't think I did too bad.

 

[SedonaBound]

Good info. Looks like I'll be hitting the dollar store this weekend to see if I can find some playground chalk.

Another method is to take it to a truck scale and weigh each axle, then find the recommended pressure for that weight on a Goodyear load table for the Duratrac. Adjust the scale wgt for your anticipated loading.

 

[CaseyS]

I found 40psi and above will help gas mileage on the highway at the expense of some harshness in the ride.

 

[06 H3]

In moab I would run 13 I believe. Haven't been there in 2 years they last idk 40-50k I never rotated them either

 

[derian06]

I run 25-26 on road and 12-15 offroad.

 

[Woodtick]

Did I just read that right? 25 on the road?

 

[Pappibri]

I have owned Duratracs since the came out years ago. When I had the 265's I ran them at 38-40. The 315's I run at 38. Running the Duratracs at 25 will give you a softer ride, but you will chew up the outer blocks of tread and shorten the life of the tire

 

[derian06]

Did I just read that right? 25 on the road?

37's on a 8" wide rim takes pretty low psi to give proper tread contact, and a smooth ride.

 

[rsc]

Ah-ha! Thats what the deal is then. Not too many running 37's on an H3.

 

[Woodtick]

Under inflated tires on the highway= poor gas mpg, cutting the life of the tire in half, and a major safety problem of the tire over heating and blowing out on the highway.

 

[SedonaBound]

LT tire load charts don't go low enough for the actual loads on non-commercial SUVs and pickups. The lowest listed pressure on the Toyo/TRA load table for my 305/55/20s is 35 PSI for 2090 lbs/tire; that's an 8400 lb GVW...30% over the truck's rated max. capacity! 45 PSI would bring the tire's capacity to 2425...a 5 ton truck. Makes me wonder if a lot people with oversize tires aren't running with too much pressure for best performance, mileage and wear.

 

[chaos254]

I tried 40 and found it too squirmy for me so I went back to 45. 16,000+ miles later, I dont have any abnormal tire wear and I dont think it rides rough

 

[Cyouincourt007]

i go by what the door says and add a pound or 2 extra so puts me at around 33 or so I think. Running Bridgestone A/T duelers on stock rims stock suspension etc...doing something wrong?

 

[derian06]

At 30-33psi the ride was horrible and not all of the tread was making contact, so I went on the heep forum and everyone else with similar set ups were running 23-27 so I went down to 26 and it's been wearing perfectly and ride is a whole lot smoother. Hopefully it stays that way.