RowJ

Nope! Read too quickly...thought you had Parrelli's not Parnelli's!
Never seen a 33x12.5 (till just looked them up).
Built for Off Road.... which is usually softer rubber and lower mileage.

RJ

Ridiculies

Maybe I'm exception to the rule, I have over 30k on mine, lots of life left, tow a 30' travel trailer for almost all of those miles. A great looking E rated tire, and noise level rather low for a MT tire. I'll buy them again and again.

cquestad

65 psi in what width? Sounds like way too much...making them wear out quicker in the center.

Cracker

13.50. Mine are wearing straight across.

I have since dropped the pressure. I felt there's no reason to try to save wear and have a rough ride.

cquestad

Try 40 front...32 rear if LB 35 rear if SB.

The is no way 65 in a 13.5 wears flat unless there is 8k on the axle.

Cracker

I'll give it a try.

07dodge

I have 35's and i have just a lil over 30,000 on mine. They have may burn outs and pulls down the track, and still have about a 1/4 tread. i dont care too much for the ride though. I haven't been too sucessful in getting them balanced. I run 70psi in them and they seem to wearing like iron.

dodgezilla04

mine are wasted with 25k on them. too much tire spin.

flytrip

15k-18k on mine. Could be replaced any time. I will buy something else next time.

XLR8R

I keep 65psi in the 13.5" wide 37" MTs all the time unless we're competing... no way they wear flat w/o lots of weight on the axles (and we don't hook the GN more than once a week), but sure helps the mileage - and the trucks handle much better with the higher pressure.

Also, with the agressive shoulder/sidewall lugs, there's still plenty of rubber left on the sides of the tread for good traction with reduced pressure when you need it... and the tires still "look" good to LEOs so you can economize them for another 10K miles.

GlennRMK

What kind of psi are people running in the 12.50s? I'm running an 8" wide rim.

I'm running the 35x12.50r17 and max psi is 65. So, I'm running 57 in the front and 50 in the rear.

When I got them they had 38 in the rear and 42 in the front which seems too low. Saw quite a bit of sidewall flex

Ridiculies

I run mine at around 50 front and back, I had them at 60 for extra mileage but it was just to harsh of a ride on the bumps. I'm sure you could air them down even more for a better ride, but for now I'm runnin 50.

SlowSixSpeed

I run about 38-41psi in my 35X18. They ride and wear great. There's no reason to be at 65psi empty on 35's.

Les Schwab set's them at 38psi.

GlennRMK

Sidewall really seems to flex with that small amount of air. Especially in the front

I was thinking maybe go down to 50 front and 45 rear, but I'm not sure.

chipmonk

completely agree. in a test on a ford F-150, an off road mag found the difference between running the tires at max pressure (65 psi) and running them at an empty cruising pressure calculated from tire load inflation charts (40 front/35 rear) was a whopping .06 mpg.