Tire pressure for 33's on jlu sport s

zeak

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just got my jlu sport s and had the dealer switch out stock tires/wheels for bfg ko2 285's on 17x7.5 MSW type 77 wheels from tire rack. The dealer set the tires to 50psi. I've searched on multiple threads and this consistently seems very high. I will do a chalk test eventually when i have some time, but in the meantime i was wondering what people in my situation have done. the car is a mall crawler for now with a little highway driving. i will eventually use it off road and have seen multiple threads about going lower for that purpose. thanks.
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Uhdinator

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Rubicon with stock 285's door sticker is around 37 psi (recommended by mfr for best MPG)

a few psi less will render a little softer ride and not wear tires out in the middle/more even wear with slightly less MPG.
 

WranglerMan

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I would say 33-35 but a chalk test would be best
 

Shak14

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I ran into the same issue with my JLU Sport S on 33's. Came with 55psi...Very harsh to drive. I dropped to 36psi and seemed good, but then went to 38psi which was pretty rough as well. I am now running 35psi and is comfortable without being bounced all around at highway speeds.
 

wrangster

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Running 275/65/18s @ 36p.s.i. Terra Grapplers XL load range and they feel very comfortable better than the stock 245/75/17s. I do believe the sidewall load range has a lot to do with the ride.
 
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