tire pressure, why so low?

i looked on the inside of the door of my 05 reg cab 4x4, it says the recommended tire pressure is 29lbs front and rear. why is this number so low? my car recommends 35 front 33 rear, so it makes 29 just seem low. if i go around sharp corners, the tires squeal like they are underinflated. is it going to make the tires wear funny if i inflate them a bit more?

oh and as for the tires, as far as i can tell they are stock dunlops. i say stock just becuase they are teh exact same tire and size as the spare. unless the original owner changed the spare as well.

 

They are different tires than your cars so that's why the different pressures. The manu recommends a pressure that will get the "best" combination of ride and gas mileage.

Best way to test wear patterns on tires is the chalk method...Draw a line across the tread with chalk and then drive 100 yards or so...See where the chalk wears and adjust your pressure (More pressure if the outsides wear more, less if the middle wears more). Test again until you have even wear all the way across. Note the pressure and the feel of the truck. Adjust from that number for ride or mpgs.

How fast are you going around said corners? and have you had your alignment checked? I installed a lift and had a tire squeal for about a week until I got it aligned...It drove straight...but it was not aligned properly in turns.

 

A lot of people run slightly higher air pressure.... It's all a personal preference.

I'm running about 34psi in mine. The truck feels much firmer with a few more lbs in it. Saves slightly on gas also. I rotate my tires regularly and haven't seen any unusual tire wear from the higher pressure. Just recently, I lowered my rear tires to 30psi because my tires are getting thin (1/4" tread left) and the truck is getting squirrely in the wet weather. Milkin it out till I need new tires.

 

just had it aligned last week, and around these corners i'm going maybe 10 mph at the most. mainly the corners in my neighborhood, people keep givin me dirty looks squeeling tire around the bends.

 

I have the tire squeal thing as well when taking corners. I have 30 psi in my tires and am thinking of upping it a couple of PSI to say 32-34 to see what the difference is.

If this does not stop the squealing I will have the alignment looked at.

 

At 29psi, mine look awfully low.

I usually run 34 psi in the stock Rugged Trails.