Tire pressure on 35s : 39 psi vs 35 psi

Broncasaurus

Jul 28, 2022

This may be an "I can't believe he just asked that moment." I'm asking it anyway.

I've seen a few threads in various forums where people have discussed lowering the pressure in their tired from Ford's recommended 39 psi to ~25 psi. In fact, when I picked up my Bronco, the salesman mentioned that one of the employees at the dealer did just that on their Sasquatch. I understand that people are reporting that their tires ware more evenly at the lower pressure. I also saw one person say that they felt their ride was "smoother."

My question is why did Ford pick 39 psi? How is that determined by a manufacturer? Are there any drawbacks to running the lower pressure? Are there times when someone that is normally running at a lower pressure should go back to the recommended values?

Thanks for sharing your thoughts on this. I'm ready to learn something.

Last edited by a moderator: Jul 28, 2022

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Dec 24, 2023

#20

If you look at this issue from a gender point of view, females would want 39, where males would want 35!

Dec 25, 2023

#21

I felt like the tires, especially in summer when I first picked it made the high speed handling feel skittery at 70-85. Dealer set them exactly at 39. With the heat they were running 45 PSI plus, and the truck felt very dodgey if I had to make a sudden lane change to avoid a collision at speed. The ride is better and like I said tire wear is very even running 34-35 cold.

2022 Bronco 2dr Basesquatch 2.7
Carbonized Grey Mod Bumper Rock rails Brush guard Hitch Pod lights Black bead locks KMA-367

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