Tire pressure

[chui]

Ok - so crazy question - I am running AT BF Goodrich 275x70x16 tires on my 80 series. Side of tire reads max 65PSI - Checked pressure and noted tires were all at 48 psi.
What is supposed to be the correct pressure in the tires. Someone tells me 35psi - but wont that just make the tires look flat? advice please
i run both on tarmac and off tarmac

 

[khoi911]

65psi is the max psi. You can run whatever psi you are comfortable with. I run 40psi with these tires on the road. When you go offroad (especially sand) you need to run a lower psi for maximum traction as lower pressure creates a larger tire surface area that is in contact with the ground. I hope this makes sense.

Ok - so crazy question - I am running AT BF Goodrich 275x70x16 tires on my 80 series. Side of tire reads max 65PSI - Checked pressure and noted tires were all at 48 psi.
What is supposed to be the correct pressure in the tires. Someone tells me 35psi - but wont that just make the tires look flat? advice please
i run both on tarmac and off tarmac

 

[coax]

Ok - so crazy question - I am running AT BF Goodrich 275x70x16 tires on my 80 series. Side of tire reads max 65PSI - Checked pressure and noted tires were all at 48 psi.
What is supposed to be the correct pressure in the tires. Someone tells me 35psi - but wont that just make the tires look flat? advice please
i run both on tarmac and off tarmac

I don't have the link handy but do a search. There was a great thread that went into the details of tire pressure, and calculating the appropriate pressure based on conversion of "p" tires to "lt" tires, different sizes, load ratings, etc. If I had to guess with that stock size in a LT tire, D load range, would be in the upper 30's. When I calculated the pressure for my 285's, it came out to about 41 psi.

 

[98 SNAKE EATER]

When I got my first set of MT's (315/70/16 KM's), I contacted BFG, told them my vehicle weight and they suggested running 42psi

I usually run about 40psi while in NY (local City driving) and run 50psi max for road trips to Florida where most of the time is spent on highways

I got 120,xxx miles out of them and they still had enough tread left to sell them for a $100 bucks each

Could've went longer, but had one blow out on me and wasn't able to do a 5 wheel rotation anymore, so I went with 305/70/16 KM2's and they've been hold up great as well

 

[tpham32]

You never wanna fill your tires to the max when their cold because as you run them, they'll get hotter and the PSI will increase too.

 

[steffan]

The max number on the sidewall is the maximum cold psi: Manufacturer accounts for any gains due to heat from driving

 

[98 SNAKE EATER]

Yep, sidewall always states the max cold psi

 

[kazisaki]

So what will happen if I run 32 psi on 275's? Is that bad? I notice the ride becomes a bit softer at these levels rather than at 40 psi.

 

[REKCUT]

My opinion is less pressure=softer ride but at the expense of quicker wear on road. Its much easier to scalp off the front tires with low pressure. Higher pressure=stiffer or ruff ride but will wear better, but only to the extent that you dont ballon them up where you wear the center out before the sides. Its something you need to play with and find the correct fit. I usually run about 5 pounds more in the front because of the weight of the engine. In my truck I will pump up the rear when I haul heavy loads.

 

[tromz]

I run 41 in the front....rear dependent on load
18 off highway

 

[ray6]

Factory suggests 32. Higher or lower creates uneven wear, either on the center or outer edges. If u have a heavy rig, thats a different story.