I was wondering do I need to follow the tire pressure specs listed on the truck since I have 20's? If not then what tire pressure should I use?

 

I run the front about 5lbs more than the rear. I run the rear by the label , The front will wear on the outer edge so the added pressure helps bow the tire out and wear the middle down some.

 

30PSI all the way around like my sticker says. You won't wear your outer edges of your tires out if you keep up with your alignments and rotations that are recommended.
I'll only add psi if I'm towing or hauling heavy weight. Though I only put 40psi to the rears (if load is heavy) and put 35psi up front.
Rotations: 5-6K
Alignments: 12-15K or whenever the suspension has been changed
My 275/55/20 Goodyear Eagle LS tires have 30K on them. They are just a tad worn past half way of tread life. They have 6/32 of tread life.

Jim

 

i have the same tires and they only have ~20k on them and I am all ready having to buy a set. Honestly, I don't do burn outs or anything crazy......

But thanks for the info thou.

 

And your truck is lighter........hmmmm, you must not be doing something right.
My tires have been under several burnouts. At the track and the street. All comes down to preventative maintenance in the end.
Rotations and alignments keep your tires lasting the longest.
Just look at mine. I rotate mine every 4,000-4,500 miles. Basically, every oil change.

Jim

 

well.........heres what I do on the front AND the rear. I take a can of white paint and carefully spray a stripe across the tread on all four tires and let it dry. After it dries I then drive the truck down the street, then I check the wear pattern on the stripe, if there is any stripe left on the outside of the tires I will lower the pressure in the tires just until the whole stripe is worn off, this insures that the contact patch is at its widest. If the stripe is worn off, I will then raise the pressure in the tires and spray another stripe on the tire then do the whole procedure again. IF the contact patch is at its widest this means that the whole of the tread is in contact with the road, this equals the least amount of wear, the least amount of wear equals longer tire life......this works for me.

 

that seems like alot of work to get optimal PSI, i wouldnt have the patience, i would say go with whatever the specs on the tire you buy say

 

this takes all of 30 minutes....optimizes mpg, improves handling and extends tire life, I'll spend 30 minutes to save hundreds of dollars, I've got more patience than cash

Did I mention that this also maximizes traction..which also maximizes brake effectiveness, the list can go on...?

 

i guess i didnt know it didnt take that long for the paint to wear off. its a good way to get stuff all right and everything, maybe ill have tgo try it