Toyo OC MT tire pressure (1 Viewer)

[tuffcitycruiser]

Just got a set of 275/85r17 open country mts and I was curious what tire pressure I should be running them at. They are currently set at just under 50psi all around. Thanks!
Ps. I love these tires and would recommend them to anyone. Was expecting them to beach louder. The off- and on-road handling is a massive improvement over the m55s I replaced.

 

[klinetime574]

What wheel width are you running?

The "chalk test" is the absolute best way to determine tire pressures. Put chalk on the tires. Drive a short distance. Straight line. See if it is wearing off in the middle, edge or evenly.

I'm gonna bet it'll wear in the center. Not familiar with that tire size and the wheel width plays in a little bit.

 

[tuffcitycruiser]

bought the tires and wheels together, but i'm pretty sure they are 8 or 8.5. tires are 34.1 x 11.5. would love to do the 'chalk test' but it's raining.... thanks though

 

[Trapper50cal]

I'm running 33x10.5R15 Toyo OC MT's at 48-50psi for better (less) rolling resistance on the road...I air them down to 35-38 for Off-Road and 15-20 for rockcrawling.

 

[forestdan7]

I also have Toyo OC MT 33x10.5x15. Love these tires. I run them at around 38-40 psi at 5000 feet. I'd run them higher, but I'm concerned they might really expand when they're hot and I'm up above 10000 feet.

I just ran them at 40 psi from Colorado to Kentucky and back, and rotated them while I was there. Really not bad at all on the highway, and I see no unevern wear. Even averaged 14 mpg after correcting for extra circumference.

 

[robustbambi]

dont they say the tire pressure on the sides?

 

[cruiserpilot]

I've got a set of 285/75R17's on 17x9 rims. I started at 40 psi, but now I run them at 34 on the highway. 14 psi on the west coast logging roads to smooth out the ride. I didn't notice a much MPG difference running them at a lower pressure, but nicer ride.
Next time I'm in Tofino I'll pm you.

 

[tuffcitycruiser]

Right on. Thanks for the suggestions.

 

[TobyB]

dont they say the tire pressure on the sides?

That's just the maximum pressure for a fully loaded tire-
when you reduce load, you can (and usually should) reduce
pressure to improve handling and wear.

This is gonna sound nuts, but start with the recommended pressure
from Toyota. Then adjust from there...

t

 

[robustbambi]

That's just the maximum pressure for a fully loaded tire-
when you reduce load, you can (and usually should) reduce
pressure to improve handling and wear.

This is gonna sound nuts, but start with the recommended pressure
from Toyota. Then adjust from there...

t

So since i never run the max load for the tire, i should run a slightly higher psi perhaps? I just figured the number on the tire was what toyo decided was best for the tire

 

[TallCanDan]

So since i never run the max load for the tire, i should run a slightly higher psi perhaps? I just figured the number on the tire was what toyo decided was best for the tire

No sir, lighter load = less psi. Heavier load= more psi. My wagon is empty, I have no heavy add- ons and I run 5 less psi in the front and 10 psi less in the rear than what is stated on my sidewall. Front tires obviously 5 psi more for the motor. YMMV with different size tires.
With the psi I am running, the inner and outer 1" edge of the tires are not touching the ground front and rear, so I can go a little less.

 

[robustbambi]

No sir, lighter load = less psi. Heavier load= more psi. My wagon is empty, I have no heavy add- ons and I run 5 less psi in the front and 10 psi less in the rear than what is stated on my sidewall. Front tires obviously 5 psi more for the motor. YMMV with different size tires.
With the psi I am running, the inner and outer 1" edge of the tires are not touching the ground front and rear, so I can go a little less.

Thanks Danny and TonyB, tires are one part of the cruiser i never thought id get confused about lol.