Tires Splitting/Cracking?
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Elder User
Joined: Dec 2006
Posts: 725
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From: Gettysburg, PA
Tires Splitting/Cracking?
I just noticed today that quite a few places on my tires (Cooper Discoverer STT) are cracking/splitting in front of the tread lugs, mostly in the center lugs. They range fron about 1/4" to about 5/8", looks like the carcass is slowly seperating.
I've got over 30K miles on the tires and they still have a good bit of tread left, but this has me a little concerned... they get rotated every 5K religiously and I try to keep up on the air pressure as much as possible. Ill try to get pics within the next day or 2.
what do you guys think?...
I've got over 30K miles on the tires and they still have a good bit of tread left, but this has me a little concerned... they get rotated every 5K religiously and I try to keep up on the air pressure as much as possible. Ill try to get pics within the next day or 2.
what do you guys think?...
Fleet Mechanic
Joined: Apr 2007
Posts: 1,433
Likes: 7
From: NH
Kind of strange,
But you may want to check the date code of the tire.
I have read of some people purchasing 5 year old tires.
Tire Tech Information - Determining the Age of a Tire
It may also be a combination of the climate you live in, where it is parked and possibly different compounds or cleaners you may use.
Unless your doing the rotate yourself i wouldn't spend the money to have them rotated every 5k but more like 10-12k.
But you may want to check the date code of the tire.
I have read of some people purchasing 5 year old tires.
Tire Tech Information - Determining the Age of a Tire
It may also be a combination of the climate you live in, where it is parked and possibly different compounds or cleaners you may use.
Unless your doing the rotate yourself i wouldn't spend the money to have them rotated every 5k but more like 10-12k.
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Elder User
Joined: Dec 2006
Posts: 725
Likes: 0
From: Gettysburg, PA
these are the first tires ive had ever do this, I rotate them myself. Only reason I do 5K miles is cuz there a MT. Thanks for the link Dave.
looks like ill be getting new tires sooner than I expected. Last thing I need is tires flying apart and my truck getting eff'd up.
looks like ill be getting new tires sooner than I expected. Last thing I need is tires flying apart and my truck getting eff'd up.
Postmaster
Joined: Apr 2006
Posts: 3,524
Likes: 2
From: CA Bay Area
That usually is combination of age, poor quality and UV (sun) exposure.
I do own vintage bus conversion, where for the experiment I keep one original tire on tag axle. The tire is so old, that nobody can decode the vintage DOT number. It is about 30 years old and still holding 80 psi of pressure for whole year.
But this is the size used in commercial trucking, where new Michelin cost me $550 a piece.
Common car tires have 6 years age warranty. Read the DOT numbers, or post the darn pictures.
I do own vintage bus conversion, where for the experiment I keep one original tire on tag axle. The tire is so old, that nobody can decode the vintage DOT number. It is about 30 years old and still holding 80 psi of pressure for whole year.
But this is the size used in commercial trucking, where new Michelin cost me $550 a piece.
Common car tires have 6 years age warranty. Read the DOT numbers, or post the darn pictures.
Lead Driver
Joined: Jun 2007
Posts: 6,757
Likes: 5
From: Corvallis, OR
What tire pressure do you run? Could be too low causing the tires to get hot from excess flexing.
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Hotshot
Joined: Mar 2007
Posts: 10,101
Likes: 40
From: Pa
Make sure you check the sidewalls for cracks. I have had issues with 2 sets of coopers (8 tires) where the sidewall started developing cracks in less than 6 months. Cooper put out some bad tires and getting a dealer to warrenty them can be a pain.
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Elder User
Joined: Dec 2006
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From: Gettysburg, PA
I run between 55 and 60 psi, back in the winter I aired them down to 45 cuz of the deep snow. Sidewalls are fine, All 4 of my Coopers have cracks in them, the one front has 5 that I saw. I checked the age and they were made in 09, I got them in July of 09 so age is not a problem.
Im thinkin about ordering a set of Hankook Dynapro MT's as a replacement for my Coopers.
I wanted to get pics today but its raining and im at work now. supposed to rain all week.
Im thinkin about ordering a set of Hankook Dynapro MT's as a replacement for my Coopers.
I wanted to get pics today but its raining and im at work now. supposed to rain all week.
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