Quote:
Originally Posted by mr_pink
i have a '14 limited with the stock 20s and i ride on 25psi. allday. dont be scurred.
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If you are running 25psi on the road, then you're taking your life in you're hands. Emergency maneuvers can become lethal and you're increasing tire wear.
A very foolish suggestion and one that can literally kill you.
Low tire pressure is what brought about the
Ford/Firestone debacle and resulted in the TREAD Act.
Back in the late 90's, I had just moved to DC from working at the
Volpe Center and was peripherally involved in the
Ford/Firestone issues.
A very common thread in many of the accidents was this:
The tires were initially inflated to 26psi (remember that Firestone recommended 30, but Ford downgraded that for comfort and rollover reasons)
The owners didn't check pressure
The drivers left the roadway to the left in a left hand turn
The drivers over-corrected to get back on the tarmac
The tire tread separated resulting in either total loss of control or a rollover
Many of the deaths involved unbelted occupants
But the biggest cause was under-inflation
While the psi listed on the door jamb doesn't need to be taken as gospel (like Ford, it is always biased towards comfort), you should never go more than about 10% below that number (increased wear) and at 20-25% things start getting dicey.
I always up the pressure a bit (in 2psi increments) until it starts affecting ride quality, but I won't increase the pressure by more that 20% or so. More air increases your mpgs and will improve handling. More than 20% or so and you'll increase wear on the center of your tires.
So do not decrease tire pressure to increase comfort.
Decreasing pressure for offroad is another discussion.