what should the psi be for 285/70/17 BFG A/T???

 

I believe those are a load range D tire. If so run them at 45. Do not go below about 40, except temporarily to get out of mus or sand.

 

awesome.....thank you kingfish

 

it seem too high for tires? ride stiff??

I usually set at 35psi for comfy ride.

maybe your explain more clear?

YOMAN!

 

I ran 40psi in that size and D load rating on my last ride.
Happy trails.

 

Way low for a load range D. Read here,about a quarter of the way down, it has a chart of pressures that would cause the TPMS to activate a warning for low pressure.

 

The pressure in a tire positions the tread relative to the road surface - too much pressure wears the center, too little wears the edges. The stiff sidewalls of the D or E rated tires require more air to flatted the tire to the roadway.

If you are looking for a comfy ride, look to the suspension, ride quality should be generated by the suspension (spring rates and shock valving), that's what it is for. Tires are designed to provide traction. While the two act together, people often use the tires as their suspension and destroy the tires in the process.

The correct way to set up tires requires a fair amount of effort and few people actually go to the trouble. It is actually very important when you move much from the factory size or put wider tires on narrow rims. In simple form, take sidewalk chalk and draw a line across the tread. Drive 100 feet or so, doesn't take much. Look at the chalk pattern. If it wears evenly across the pressure is about right. If it wears at the edges, add pressure and do it again. Wear at the center remove some air and do it again. It's a dial in process, so be ready to do it a few times. If you are really energetic, you can do it at both the low and high side of the pattern and the halfway point between is perfect.

 

ok cool...good to know..

I m planning to get Nitto 295/70/17 on my truck soon as wheels arrives!

I believe they re D load too. i ll set at 40psi.

thanks!
YOMAN!

 

I start at 50psi and work my way down, I'd rather start with more air in tires than not enough. On long trips in hot weather I keep them a little higher for better mileage and less chance of getting a blowout. My tires are 50psi max and I usually put 45psi on long trips. 40 to 42 in town on our bumpy *** street's. In my Toyo tires that are rated at 65psi, I start at 55psi and let air out untill my eyeballs quit rattlin' from our terrible street's and interstate's!!