.

Tire size LT275.65X18 Goodyears .

Door sticker states 40 psi cold on all four .

Truck is run with 1/4 tank of fuel and driver and 40 psi seems too
high for my useage .

I am thinking 38 psi front and 36 psi rear .

Suggestions appreciated .

Thanks

.

 

The difference between 40 and 38 is most likely in the noise level of your pressure gauge. Even 40 to 36 is only a 10% decrease.

General rule of thumb is that tire pressure is directly proportional to fuel economy (within the "normal" band of pressures). Overly inflated tires will lead to increased wear in the center of your tire; overly deflated tires will lead to increased wear on the edges of your tire.

Good luck.

 

keep all four tires the same psI...safer

 

.

As no one responded with data I did my own .

Front 38 , Rear 36

Temperature checked with lazer gun - no change from 40 . No
increase in temp means all is well with tread and sidewall flex .

Ride is smoother with no loss in mpg .

According to tire companies tires on the same axle must be the
same pressure , but no problem adjusting each front or rear axle .

The front axle supports more weight in most daily use situations .

I will weigh all four corners and get accurate axle weights to update
data and include weight charts with my 600lb motorcycle to confirm
any change necessary .

.