On a half ton? I always ran 40-45 psi. I noticed above 35 psi, the tires wore really nicely. Above 50 psi, they tend to wear in the middle faster.
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My truck is a 1 ton SRW diesel with a front end replacement bumper hootus. I keep 65 in the front and 60 or so rear. I think my tires recommend 80, but it's too **** rough at 80, and the tires wear better at 60-65. I don't add any to the rears for towing/hauling unless I was planning a long trip with a heavy load. I had the gooseneck at 22.5k the other day, and the rear truck tires were fine.
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Originally posted by marshman View PostJust put a new set of tires in my truck. Had a leveling kit installed so went with bigger tires. They are 35x12.50x20. What air pressure should I be running? I know on the sidewall it says up to 80psi cold, but I know it’d ride like an old logging truck if I put that much.
35x12.5x18
45psi front
40psi rear
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Do the chalk test and figure out what the truck/tires want. Make a chalk mark across the tread of your tires. Air them up and drive a very short distance. If the mark disappears in the middle and stays on at the edges of the tread, let air out and try again. Do this until the mark disappears evenly across the face of the tread and you’re good to go.
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Originally posted by Texans42 View PostF250 6.7 with replacement bumper
35x12.5x18
45psi front
40psi rear
It’s also how Carli suspension specs out all their 35” tire set ups
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Originally posted by BlackdirtCowboy View PostDo the chalk test and figure out what the truck/tires want. Make a chalk mark across the tread of your tires. Air them up and drive a very short distance. If the mark disappears in the middle and stays on at the edges of the tread, let air out and try again. Do this until the mark disappears evenly across the face of the tread and you’re good to go.
Several decent suggestions here but this is the best answer given.
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