What PSI do you run on your k5 tires?

[wazzabie]

What PSI do you run on your k5 tires? Does it matter what size tire?

 

[Bent77]

Have you ever heard of the paint contact patch method?
essentially paint the tread white with spray paint and drive it (mostly straight)
The paint wears off at the contact patch, depending on inflation
Typically this shows up in the recommended operating range for your psi if the tires are the correct load range and correct wheel width

the 315/70/17s on my k10 are at 42psi

 

[nvrenuf]

18x39.5 Boggers on 11” wide wheels, I run them at 22 psi. I could probably go down to 18~20 psi but as is the tires feel pretty sloppy on the road at 45-50 mph in curves, etc.

 

[wazzabie]

I run at 32 psi. Not sure if that is correct or not.

 

[Bent77]

I run at 32 psi. Not sure if that is correct or not.

depends on a lot of things

 

[Blue85]

What PSI do you run on your k5 tires? Does it matter what size tire?

Think about what PSI stands for and what the tires are doing. So yes, changing tire size makes a difference. Don't go off what someone else is doing, figure out the correct pressure for your setup.

 

[obijuank5]

5 front 3 rear. It handles horrible at 60.

 

[wazzabie]

For a 235-75-15 tire what would be a good starting point for tire PSI?

 

[Wes Harden]

35 psi for street use. 25 psi off road. Also depends on load rating truck tires come in C, D, E. For a K5 I would prefer C rated tires

 

[sweetk30]

old truck way back . k10 long bed . sbc iron head / th350-205 / 9" total lift on 38x12.50x16.5 tsl bias ply . 25psi was sweet spot for ride and handling .

as said tire chalk test or paint . and you can dial in the psi any specific combo needs .

 

[wazzabie]

Have you ever heard of the paint contact patch method?
essentially paint the tread white with spray paint and drive it (mostly straight)
The paint wears off at the contact patch, depending on inflation
Typically this shows up in the recommended operating range for your psi if the tires are the correct load range and correct wheel width

the 315/70/17s on my k10 are at 42psi

Never heard of this. What are you looking for with this method? That the tire tread pattern is fully on the contact patch?

 

[Bent77]

If it’s over inflated, you will wear the paint off the center first, faster

Under will wear the edges first

What load range and tire are you using?

 

[doubletrouble]

I run 5psi under what the tire says for max psi.

 

[Blue85]

For a 235-75-15 tire what would be a good starting point for tire PSI?

You're running tiny 29" tires which are probably close to the factory door sticker, while asking a group of mostly modified rigs what they run, while as we've already covered, only your axle weights and tires apply.

 

[mrk5]

I've got front and rear axle weights for the crew cab so I do the math based on the max load and psi listed on the tire. It works out to the mid to high 20's. Then I add about 4 psi.

I kind of cross check this with a similar method to what @Bent77 mentioned. I've noticed the tires pick up the fine dust off the shop floor and I can see how far across the tread the dust goes. I like to see it about 90% or so.