Topic: Tire Pressure driving me crazy!!!

[killertoy1985]

Just got a set of new shoes General grabbers 285/75/16 for my 04 Tacoma weighs about 3750 lbs lbs, i got my new shoes air to 46psi up front and 49 lbs in the rear i used the ORA calculator in there July issue but to me they still seem low. the rides nice. My fear is they will wear to fast, anyone that could offer some advice or whats worked for them  i would greatly appreciate it.

[kneedownnate]

Unless you're hauling a couple thousand pounds in your taco, there's no good reason for you to be over 40 psi, and assuming they're an LT rated tire you'd probably be better off around 35.

[junya92toy]

Check the drivers door for factory pressure, with stock tire size.

[killertoy1985 [OP]]

The factory tire pressure 26psi front 29 in the rear. way to low for a 33 inch tire upgrade. almost looks flat.

[kneedownnate]

I have 33x12.50-15 on my 4by and run down to about 25 psi, but have them at 32-28 for better mileage.  You can't go on looks with a radial.  I have probably 30 or more people pull up to the shop for air checks each day saying either they thought their tires looked low or somebody else told them they looked low.  Tires be what I do 

[kneedownnate]

And let us know how you like those grabbers, I'm still pretty curious about them!

[IronClad]

The factory tire pressure 26psi front 29 in the rear. way to low for a 33 inch tire upgrade. almost looks flat.

Yeah uh.. thats not how PSI works

[jimbo74]

since they are still new, do the chalk test


you can't tell how much air it has, because it "looks" low


we had a forklift at work, that is a 10,000 pound rated capacity, off-road forklift, it uses 40 psi  in the rear, while transporting loads, it looks flat... but 40 psi in the rear is what it uses.....

[junya92toy]

FOr the same load a bigger tire needs less pressure, a smaller tire needs more. THAt is Why the small spare for a car can take 60 psi

[killertoy1985 [OP]]

im gonna take your advice and drop them back down to 35 psi, thanks for the all the help. 
grabbers work great thus far too! Sand great. river bed awesome! rocks? i will let you know soon going to lock wood valley!