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What's your psi?

manyaday

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I'm running 35 inch tires on 20 inch rims. Does anyone know what is the best tire air pressure to use?

Thanks,
Dave
 

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I'm running 35 inch tires on 20 inch rims. Does anyone know what is the best tire air pressure to use?

Thanks,
Dave
I have been told to run what the door jam sticker says. 19 TB Custom (came w/275/65/18). I'm on 35/12.5/20 now
 
Kind of a personal preference thing ,IMHO, once you go away from stock tires...as long as you keep the psi to no more than the max cold rating on the sidewall. I run my 295/70/18 Wildpeaks at 45psi on the street, 15-20psi in the sand and 25psi on the trail. The tires are rated to run as much as 80psi cold, based on what load is on them, so I've got some room to play with...
 
Have you heard of the chalk test?

I'm too lazy to do the chalk test, so I've decided to just go with whatever Discount Tire decided to go with. They went with the psi the sticker inside the driver's door says.
 
Kind of a personal preference thing ,IMHO, once you go away from stock tires...as long as you keep the psi to no more than the max cold rating on the sidewall. I run my 295/70/18 Wildpeaks at 45psi on the street, 15-20psi in the sand and 25psi on the trail. The tires are rated to run as much as 80psi cold, based on what load is on them, so I've got some room to play with...
Same here except I have Duratrac's for winter and Nitto Trail Grabbers for the rest of the year. All what I am doing that day!
 
In my opinion, factory tires go with what's on the door. It you're buying an 8+ply tire then I'd consider running 40-45 PSI. I have always done that over many sets of tires and never had any uneven wear. And if it helps, I'm an ex-Discount Tire employee.
 
The only issue with going with the door sticker is the fact that those numbers are for factory size, type, and load rating tires. So if you are replacing your OE C-range 275/65R18 Duratracs (or whatever the 20's are) with another tire of the same type, load range, and size, then those numbers should be fine. But if you go to a higher load range (don't do that btw) or a larger tire, those numbers don't really apply anymore.
 
I bumped up my tire size slightly to the ZR2 tires (33's), and decided I would run PSI at what the ZR2's recommend, 38 PSI. Seems to be working well so far. Stock Duratracs were 41 PSI on the Trail Boss. A little too much, in my opinion.
 

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