Suggested tire psi

Cknox121 · May 23, 2013

What psi are you all running with 35's ?

Trucks a 08 f-250 with 35/12fidy/20 mud grapplers. The tire place put 50 psi in them currently.

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Jarrod B · May 23, 2013

200 psi. Cause race car!

Cknox121 · May 23, 2013

Jarrod B said:
200 psi. Cause race car!

Lmao

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Lang · May 23, 2013

Cknox121 said:
What psi are you all running with 35's ?

Trucks a 08 f-250 with 35/12fidy/20 mud grapplers. The tire place put 50 psi in them currently.

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For what purpose? Daily driving? Off road? At the track?

Cknox121 · May 23, 2013

Lang said:
For what purpose? Daily driving? Off road? At the track?

Daily driving.

Not a track truck...yet

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Lang · May 23, 2013

I max my tires out on PSI for daily driving... Get better mileage. Should be on sidewalls

ToMang07 · May 23, 2013

I run mine at 60.

jdc753 · May 23, 2013

Every vehicle and every tire I have ever had gets run within 5psi of the max. Always had good results.

'94IDITurbo7.3 · May 23, 2013

are they load range E or D and what is the max on the sidewall. if they are D's that max out at 65, then run them at 65.

Cknox121 · May 23, 2013

'94IDITurbo7.3 said:
are they load range E or D and what is the max on the sidewall. if they are D's that max out at 65, then run them at 65.

Load range E

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littleredstroker · May 23, 2013

Run mine at 40 psi all around, unless I'm towing then the back gets 55. I get 50-60k out of a set and it rides a lot nicer. Only lost .5 mpg

sent while looking at a hole in my block

7.3 Cowboy · May 23, 2013

75-80 psi on 10 plys

Betarocker · May 23, 2013

I run 38psi front, 35psi rear. I have 37x13.50LT18 though. When I had 35x12.50LT18 I ran them 40psi F, 37psi R. Towing or heavy loads I add air as needed.

Wear was most even then. Running higher pressure wore the middle faster, lower psi wore the shoulders faster.

BBottoms · May 24, 2013

I've got 35x12.50R20 Terra Grapplers. When I ran mine at 65 front/60 rear the center of the tread wore faster than the edge. Not a huge amount, but enough that it was noticeable after ~15k. I recently dropped to 60 front, 50 rear. It does ride a little better and I haven't noticed any significant drop in fuel mileage. I'll have to get a few more tank fulls to know for sure if my average is dropping. I may try dropping the front to 55 and see how that does.

There's always the old chalk test to see what your contact patch is. I may do that out of curiosity, but I think 50psi is the lowest I'll go regardless.