10 lbs under max inflation imo.

 

35PSI

:shrug:

 

what size tire?

 

i got 255/35/20s and i think thats what they are at that or 40psi cant remember i have had then off for a while

 

245/40r20

 

I am using the same size as you - Proxes 4.

I air them to 32 psi cold. This works well for me.

Giff

 

all tire pressures for any size tire should be about the same . Just depends on what kind of tire it is.

 

look on ur side wall

 

Sidewall just shows max pressure. What you should use is generally 28-36 psi, it all depends on your local weather conditions, tire size, and several other variables.

best bet is to inflate the tire to 33-35 psi, and watch how they sit. If you see them balooning a bit in the middle, that's too much air pressure. If the middle of the contact patch wears slower than the outsides, or you feel that the vehicle feels wishy-washy as far as handling, then that's too little, and the tire is underinflated.

Inflation pressure
Tires are specified by the vehicle manufacturer with a recommended inflation pressure, which permits safe operation within the specified load rating and vehicle loading. Most tires are stamped with a maximum pressure rating (for USA only). For passenger vehicles and light trucks, the tires should be inflated to what the vehicle manufacturer recommends, which is usually located on a decal just inside the driver's door or in the vehicle owners handbook. Tires should not be inflated to the pressure on the sidewall; this is the maximum pressure, rather than the recommended pressure.[4]

If tire pressure is too high, the tire contact patch is reduced. This decreases rolling resistance, but does not necessarily decrease braking distance.[5] In addition, ride comfort is reduced and the center of the tread may wear more quickly than the shoulder.[6]

If tire pressure is too low, the tire contact patch is increased. This increases rolling resistance, tire flexing, and friction between the road and tire. Underinflation can lead to tire overheating, premature tread wear, and tread separation in severe cases. Significant underinflation can also increase braking distance.[7]

 

I have the same size tire and I find that 35 works best for me, 40 is just to rough of a ride.