Whats a good tire pressure for me?

Question

I own a Jeep JK and just got larger than factory tires installed on it today (285/70R17 Duratracs, in inches its 32.75) . I have been resetting my computer to the new tire size and I realized I don't know what a good high and low tire pressure would be for the larger tire. The max inflation on them is 65 psi, I don't know what they are currently filled to. 

In the end I'm just asking what a good high and low tire pressure is for a 33'' tire driving mostly on tarmac. Thanks! ( I tried to get carried away)

Stpaulguy · Accepted Answer

Tire pressure is based on the WEIGHT of the vehicle, not the size of the tire. You should inflate them to the pressure shown on the label inside the driver's door. NEVER NEVER inflate to the maximum listed on the tire. That pressure will cause rapid tire wear in the center tread, lift the shoulders off the road and decrease traction, and cause hydroplaning. 

Tire pressure sensors vary in when they must light the warning light, but ALL must light the light when pressure is 25% below the factory recommendation.

Mark F · Answer

That depends on whether the tire is Passenger Metric or Light Truck Metric, which you don't tell us.

Whats a good tire pressure for me?

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