Chevy Silverado and GMC Sierra Forum banner

Tires are cupping...but from what?

1 reading
12K views 11 replies 9 participants last post by  Mike the Carpenter  
#1 ·
03 2500HD 280k, tires are starting to cup worse, what do you think is the worn out part?
Im planning on doing a front end in the next month or two but seeing the difference in tire wear lately i think thats gonna have to happen sooner!

Only work done was I just changed the front drivers wheel hub as it was starting to get noisy
Image
Image


Sent from my LG-H812 using Tapatalk
 
#2 ·
Alignment good?

Check for any play you may have. Jack up on the lower controls arm and try and move the wheel up and down, side to side, etc. You should have zero play.

If you do, then have someone move the wheel and look to see where the play is coming from. Balljoints are fairly common once you get up there in miles.

But cupping can also be caused by bad shocks. As can unbalanced tires and nuat plain cheap tires.

Also what is your tire rotation schedule?
 
#4 ·
19trax95 said:
Alignment good?

Check for any play you may have. Jack up on the lower controls arm and try and move the wheel up and down, side to side, etc. You should have zero play.

If you do, then have someone move the wheel and look to see where the play is coming from. Balljoints are fairly common once you get up there in miles.

But cupping can also be caused by bad shocks. As can unbalanced tires and nuat plain cheap tires.

Also what is your tire rotation schedule?
I have some play in the tie tod, i am also getting a creaking sound when leaving and coming to a stop, i suspect worn control arm bushings. The tires are max milers and are in great shape, mounted them 2 years ago and only when 10k lol.
Ive got the passengers side hun, inner and outer tie rods, UCA, LCA bushings and ball joints, steering damper, stabilizer bar link and bushings, idler arm and bracket and finally pitman arm.

Anything you guys think im missing on this list?
Aside from possibly shock absorbers?

Sent from my LG-H812 using Tapatalk
 
#5 ·
Never heard of that tire before. Is that the brand or the name of the tire?

Looking at the tread pattern they look very similar to how a lot of snow tires are patterned. They aren't a dedicated winter service tire are they?

But yeah if you have play then the alignment won't hold. Also these trucks really like the tires rotated frequently. I do every oil change, which for me is around 5k miles usually.

But if your doing all that work replacing the front end, then I'd definitely get a set of shocks if your in doubt.
 
#8 ·
Unless you are rotating your tires yourself, and you do it properly. DO Not trust tire companies to do it properly, or dealers for that matter, unless you can confirm the rotation or mark them, before it is serviced.. A lot of shops just go from front to back and wash rinse repeat. I discovered this with my wife's 4 runner. Took the truck exclusively to the toyota dealer. After 165,000km the tires started cupping, at the same time they started saying It had suspension problems, turns out, they just rotated front to rear and back the next rotation. FPMO. Tires were BFG all terrains, so was happy with the wear, just pissed off at the retards doing the service. I challenged them on it, they said you have to request a crosspattern rotation. F**K *FF!
 
#9 ·
I agree fix the obvious worn parts and get a good alignment and re balance the tires , in general the wear pattern once established in the tires will tend to continue although not as severely.
A tire with a semi aggressive tread pattern like yours is prone to this type of wear pattern.
You may find the once the all the problems are corrected and the truck is performing better that the wear pattern on the tires can still cause an annoying noise and effect the ride quality the wear pattern may not improve much even when rotated.
You can minimize this issue by walking around your truck a plucking out obvious large rocks from the tread like show in your picture, these can accumulate and amplify this problem.
an extreme measure to address this is after the repairs have been made is to have the tires road force variation balance checked to make sure the tire is mounted properly to the wheel confirming no excessive runout exist in the wheel or tire this is also when the tech will remount the tire rotating the tire on the wheel to reduce the amount of weight needed to balance the tire.
Then the tire can be trued even further by having the tires professionally shaved then either balanced on the vehicle or have the road force variation balance finished.
I like the concept of on the vehicle balancing but not the practice. for a few reasons. first and obvious reason is you can never rotate the tires without getting the tires balanced again also each time the tires come off you have to remember to mark the position of the wheel to the hub.
The worst part of on the vehicle balance is you normally have to rely on the technicians feel and requires weights getting put on and taken off numerous times not something want done if your running high dollar wheels.


Tire shaving can reduce the life of the tire but make the miles you have left much more enjoyable.