I have the 17" wheel package.
Why does the door sticker list different tire pressures for the front (30 psi) and rear (35 psi)?

I've heard of differences front to back, but 5 psi seems a lot.

 

It has to do with weight front to back. Very good idea to follow it. But everything you do to change the weight of the JK, will change what psi you should run. If you want to do it right you can use a temp. gauge (we used this when I was pitting on stock cars) and measure the heat in 3 places across the tread. Or you can draw a line across the tread and look for uneven wear. The chauk line should wear evenly across the tread for the pressure to be right. I'm sure there is some math formula for it, but I don't know what it is. Anybody
PS by the way, off road wheeling this all goes out the window. PSI front to back or side to side is just a guess. I lower mine to what ever traction I think I need. Then I lower them to all the same psi.

 

Hmm...I never bothered to read that sticker, but I have always run a couple lbs more pressure in the front tires in all of my vehicles to compensate for the lateral forces when cornering. Aren't tire pressure recommendations based on maximum payload? This could account for the rear tires needing more pressure if the Jeep was loaded down.

 

on my tires I found on the road that is 36 psi front and rear works the best for me. And I air down to 15 psi on the trail.