Thread: Correct tire pressure for 20"s?

the tire should have the proper air pressure marked on the sidewall. if you run to much or to little, the tires can start wear un evenly.

35-40 psi will be fine, the more pressure you run, the more center wear you get, the less pressure, the more edge wear. I run 36 psi in mine all the way around, if i was racing i'd drop pressure for better grip. i wouldn't reccomend anything over 40 psi though

when i had my last 2 trucks i ran bfg all terrains 33's x12.5 wide. and if i ran at full psi, the tires wore better, if i ran at 35 ish or even 40 the out sides of the tread would wear first and the center would still look new.

so after talking to people who ran the same tire told me to run them at 50 psi and they would wear better, and they did, so maxing out the psi is up to you, and how it feels to you and how the tires wear on you. every car rides different so its play time.

All terrain truck tire would require more air than a passenger tire SD.

of course it will its bigger and a truck tire, but maxing out psi or running low psi will wear the tire differently, car or truck, thats all i was trying to say. you need to find where the car and tire and driver are happy when running aftermarket wheels and tires.

too much air the center thread sticks out and wear off, to little the sides wear off first, you want flat contact with the road. even wear so your tires last.

back in the day tire shops used to have a sticker they stuck on the tire, then drive it a few miles, and the sticker would show if your tires were wearing evenly. no idea if thats still around tho.

Yeah I explained the same thing in my post above. I think running 40 psi in a passenger tire is probably a little on the high side. 35-38 is generally a good rule of thumb for better wear, of course you need to drop it for better handling.

is the rear end leafs or springs?

you cant get ladder bars and stuff to tighten up the rear end. reduces wheel hop.

ladder bars work for coil sprung rears, look like these.



leaf springs get traction bars. like these.



you can also make ladder bars work on a leaf spring, ive seen it done, how well it works is another story.

0 PSI Cuz they run flats.

But seriously though, 40psi is what I'd start with. If its too solid, take 2-3psi out. If its too soft and bouncy, add 2-3 psi until it feels right to you.