Tire Pressure
04-17-2006, 06:23 PM
#12
TECH Junkie
iTrader: (2)
Join Date: Mar 2005
Location: Spring, TX
Posts: 3,197
Likes: 0
Received 0 Likes
on
0 Posts
If your door sticker shows a higher PSI than your tire does, that usually means you went with a different tire load range that isn't for your truck.
An 80 PSI tire will usually be an E load type tire. A max 35 PSI tire will usually be a standard S or possibly a load C tire.
My door jams show the 275/55/20 rated at 30 psi all the way around.
If I place a wider tire than that, like a 285/50/20, I will probably run 28psi all the way around. Wide tires will wear the centers out prematurely is over inflated when they are on the rear, as will a too narrow of a rim that has a wide tire placed on it.
Cupping is due to out-of-balance, bad alignment, or worn shocks most of the time. Under inflation will usually over heat a tire and cause it to wear really fast, blow out, loss of control, and bad mpg's.
Over inflation, will wear the middle of tires, loss of control, blow out (especially in the heat of the summer coming), and give a rough jarring ride.
When towing, add air to your tires accordingly to the amount of tongue weight or payload being added to your truck.
The psi rating on the side of the tire is for "MAX" PSI rating for the maximum load rating that the tire can handle. Look at the maximum lbs that the tire has on it right before the max psi rating. Then take your trucks weight in consideration and figure it out from there.
The tire's sidewall Max psi rating is not what you should be placing in the tire when driving it with no added weight to the vehicle.
*note- always check your tires psi when the vehicle has not been driven for at least several hours or when cold. Checking a tire when it is hot or warm will not be accurate. It will show to have more psi in it than really is, due to heat expanding the air thus increasing tire pressure.
Hope this helps some of you.
Jim
An 80 PSI tire will usually be an E load type tire. A max 35 PSI tire will usually be a standard S or possibly a load C tire.
My door jams show the 275/55/20 rated at 30 psi all the way around.
If I place a wider tire than that, like a 285/50/20, I will probably run 28psi all the way around. Wide tires will wear the centers out prematurely is over inflated when they are on the rear, as will a too narrow of a rim that has a wide tire placed on it.
Cupping is due to out-of-balance, bad alignment, or worn shocks most of the time. Under inflation will usually over heat a tire and cause it to wear really fast, blow out, loss of control, and bad mpg's.
Over inflation, will wear the middle of tires, loss of control, blow out (especially in the heat of the summer coming), and give a rough jarring ride.
When towing, add air to your tires accordingly to the amount of tongue weight or payload being added to your truck.
The psi rating on the side of the tire is for "MAX" PSI rating for the maximum load rating that the tire can handle. Look at the maximum lbs that the tire has on it right before the max psi rating. Then take your trucks weight in consideration and figure it out from there.
The tire's sidewall Max psi rating is not what you should be placing in the tire when driving it with no added weight to the vehicle.
*note- always check your tires psi when the vehicle has not been driven for at least several hours or when cold. Checking a tire when it is hot or warm will not be accurate. It will show to have more psi in it than really is, due to heat expanding the air thus increasing tire pressure.
Hope this helps some of you.
Jim
Last edited by CHEVY6000VHO; 04-17-2006 at 06:29 PM.
Thread
Thread Starter
Forum
Replies
Last Post
05GMC4.8
GMT 900 Trucks General Discussion
5
08-07-2015 09:55 PM
GMCtrk
FORCED INDUCTION
67
07-17-2015 06:39 PM
