new tires cupping on the inner and outside of all tires
Thread Starter
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Mountain Pass
Joined: Jul 2019
Posts: 139
Likes: 2
new tires cupping on the inner and outside of all tires
I got new tires ( they have about 5,000 on them) that are cupping. Will bad shocks and worn coils cause this? I have never seen cupping on both sides on a tire. It does runs straight down the road. all tires have 32 lbs.
Hotshot
Joined: Jul 2020
Posts: 10,410
Likes: 2,611
From: Near Salt Lake City
Were the tires cupped when you got them with 5k on them?
Cupping will continue even on a properly aligned vehicle if the tires are cupped now
Did alignments for 35+ years
You probably just need to have your alignment checked
If the camber is too far negative and you have too much toe in, the tires cup
Same with the other way around
If you have too much positive camber and negative toe, the tires will cup
When you say all 4 tires? You mean all 4 were cupped when you got them and rotating will not help?
Increase the inflation pressure to the max it says on the tire
That will help tire wear but might hurt road feel (stiff ride)
Cupping will continue even on a properly aligned vehicle if the tires are cupped now
Did alignments for 35+ years
You probably just need to have your alignment checked
If the camber is too far negative and you have too much toe in, the tires cup
Same with the other way around
If you have too much positive camber and negative toe, the tires will cup
When you say all 4 tires? You mean all 4 were cupped when you got them and rotating will not help?
Increase the inflation pressure to the max it says on the tire
That will help tire wear but might hurt road feel (stiff ride)
Thread Starter
|
Mountain Pass
Joined: Jul 2019
Posts: 139
Likes: 2
Were the tires cupped when you got them with 5k on them?
Cupping will continue even on a properly aligned vehicle if the tires are cupped now
Did alignments for 35+ years
You probably just need to have your alignment checked
If the camber is too far negative and you have too much toe in, the tires cup
Same with the other way around
If you have too much positive camber and negative toe, the tires will cup
When you say all 4 tires? You mean all 4 were cupped when you got them and rotating will not help?
Increase the inflation pressure to the max it says on the tire
That will help tire wear but might hurt road feel (stiff ride)
Cupping will continue even on a properly aligned vehicle if the tires are cupped now
Did alignments for 35+ years
You probably just need to have your alignment checked
If the camber is too far negative and you have too much toe in, the tires cup
Same with the other way around
If you have too much positive camber and negative toe, the tires will cup
When you say all 4 tires? You mean all 4 were cupped when you got them and rotating will not help?
Increase the inflation pressure to the max it says on the tire
That will help tire wear but might hurt road feel (stiff ride)
Hotshot
Joined: Jul 2020
Posts: 10,410
Likes: 2,611
From: Near Salt Lake City
Even the 2x4 trucks cup tires a small amount
I'd have the alignment double checked
Thread Starter
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Mountain Pass
Joined: Jul 2019
Posts: 139
Likes: 2
I have 255-70-16LT tires, which match the door tag. The tag says 29 lbs for the front and 32 lbs on the rear. 28 lbs seems to low for the front so I went to 32. I will start with an alignment and see what happens.
Lead Driver
Joined: Jun 2006
Posts: 5,654
Likes: 979
From: Near Yosemite CA
If your tires are cupping, your suspension is usually the culprit, 90% of the time. Worn shocks and suspension components are what causes cupping, shocks by allowing the tire to "bounce" creating the cupping by uneven wear or loose, worn suspension parts. Before you go pay for an alignment, I would replace the shocks and check all the other suspension components, more than likely just by rplc'ing your shocks and rotating your tires you can bring the cupping under control. Also, what kind of tires, I've had some that wore best when rotated every 3k with the oil change, go over 4-5k and they would start cupping, also would help to have the tires balanced again.
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Hotshot
Joined: Jul 2020
Posts: 10,410
Likes: 2,611
From: Near Salt Lake City
The alignment man will inspect the crap out of it
If it is any loose at all the alignment man will recommend parts because he can't align it with any loose parts
If it has any loose parts and you do align it, they call it "set the toe and let 'er go"
That is what you have now
If it is any loose at all the alignment man will recommend parts because he can't align it with any loose parts
If it has any loose parts and you do align it, they call it "set the toe and let 'er go"
That is what you have now
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