Tire wear help me help my mechanic

[glnisbet]

I have a 2009 Chevy Silverado Crew Cab 2 WD. LT with 25000 miles with heavy wear on inside of front tires. Still has original General Amertrac P245 70R 17. Had Firestone do an alignment and was told that it was within specs, what is wrong that tires continue to wear?

 

Found: Left Front Right Front

 

-0.2 Chamber 0.1 Cross Camber -0.3 Chamber

3.0 Caster 0.5 Cross Caster 2.5 Caster

0.06 Toe 0.02 Total Toe -0.04 Toe

 

Left Rear Right Rear

 

-0.03 Chamber 0.08 Total Toe -0.1 Chamber

0.09 Toe 0.05 Thrust Angle -0.02 Toe

 

After: Left Front Right Front

 

0.0 Chamber -0.1 Cross Chamber 0.0 Chamber

3.2 Caster -0.4 Cross Caster 3.7 Caster

0.06 Toe 0.12 Total Toe 0.05 Toe

 

Left Rear Right Rear

 

-0.3 Chamber 0.08 Total Toe -0.1 Chamber

0.10 Toe 0.05 Thrust Angle -0.01 Toe

[Carder09]

Over/under inflation?

[glnisbet]

I run 38 lbs all the way around, mostly interstate driving.

[brainpause]

FIL had tire wear issues on his Land Cruiser. Can't remember exact issue, but alignment was within spec. He paid a guy to get it almost perfect, not just within spec. Tire issues went away.

[MikeNH]

You rotating the tires regularly? I got a bit behind doing so after I moved and got the inside of the tires choppy. Initially I thought I had knocked it out at the dunes but the alignment was within spec, just rotated them back and now 2k miles later nothing showing yet. I've been doing rotations every other oil change so every 6-8000 miles.

 

 

Sent from my iPhone using Tapatalk

[glnisbet]

Yes I rotate at every 4000 - 5000 miles, really has the mechanic stumped. No identifiable reason.

 

Since I am getting close to having to replace tires what recomendations for the type of driving and serivce that I have?

[RyanbabZ71]

38 psi seems high especially for a 2wd truck with I assume non all terrain tires

 

 

Ryan

 

 

[KMGZ400]

its normal for tires to wear on the outside.. weird that its on the inside

 

 

if you can figure it out, the best thing to do would be get new tires and watch closely to see if they start wearing or not. then you will at least be able to tell whether or not its the tires or the truck

[DJ in WV]

When I worked in a couple of tire shops years ago, we were taught that once a wear pattern sets into a tire, it continues to wear like that regardless of whether an alignment was done or not.

 

I honestly don't know if this still holds true or not, but that was the school of thought at the time, 15 years ago.