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Tractor Talk Discussion Forum

What is is causing this to happen to my tires? (picture)

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e

07-24-2007 16:14:29




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This is a picture of the rear tires on my international 1600. It has Dayton rims so I jacked it up thinking the inside tire was not aligned properly. Well, both tires spun very true. What would cause this? The inside tire on the other side looks the same.

I'm wondering if once upon a time the tires on one side were not put on properly and wore like this. Then, someone redid everything so the two good tires were on the outside and the two scalloped tires were on the inside.(basically split up the pairs)

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hd6gtom

07-26-2007 06:48:03




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 Re: What is is causing this to happen to my tires? (picture) in reply to e, 07-24-2007 16:14:29  
That can also be caused by axle sag. These old trucks have been overloaded so manny times the axles actually sag in the center. This will cause wear like this. In all the years I was in the tire business I never seen a 9.00X20 with a 55 lb air pressure rating on the sidewall.



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iowa_tire_guy

07-25-2007 05:57:21




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 Re: What is is causing this to happen to my tires? (picture) in reply to e, 07-24-2007 16:14:29  
Whenever I get any used 900-20 tires in they don't stay around too long. Even scabs get put on feed wagons and spreaders. I sell new tire tube and flap mounted for around $160 each. Since semis have taken over the farms around here I don't do very many of the split rings anymore and that is alright with me.

The rotation pattern for duallies requires that the front tires be the same as the rear. Then the front get moved to the outside rear, the outside duals go to the inside and the inside goes to the front. If you are not going to use the front in the rotation then someone will have to explain to me how to rotate because I can see no reason in it. When duals are bolted together they have to be thought of as a unit or as one tire. That is why equal air pressure is important.

Put on new tires, gauge them every time you use the truck and you won't have the wear problem.

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JoeBob/IN

07-25-2007 05:26:23




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 Re: What is is causing this to happen to my tires? (picture) in reply to e, 07-24-2007 16:14:29  
Your roads! The crown in the road will accelerate wear from any alignment problems but probably mostly the roads themselves. Try to rotate tires side to side more often.



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Walt Davies

07-24-2007 18:29:05




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 Re: What is is causing this to happen to my tires? (picture) in reply to e, 07-24-2007 16:14:29  
it really doesn't matter as both tires are way beyond there useful life. Bad bearings can also cause that they may have been on the front at one time.
Walt



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LenND

07-24-2007 18:25:34




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 Re: What is is causing this to happen to my tires? (picture) in reply to e, 07-24-2007 16:14:29  
I have 8.25 x 20 on my two ton chev and I have never carried over 60 lbs. of air and I have hauled a good maany 300 bu. wheat loads. Tires are Goodyear recaps puton in 1970's. So I don't think it is air pressure so much as it is the cupped tire is too low on air.



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perry in mi

07-24-2007 18:14:11




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 Re: What is is causing this to happen to my tires? (picture) in reply to e, 07-24-2007 16:14:29  
bad shocks, lack of rotation. ever seen a passenger car cruisin down the highway and the rear tire is bouncing like a basket ball?. bad shocks will cause choppy tires.



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e

07-24-2007 20:34:45




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 Re: What is is causing this to happen to my tires? (picture) in reply to perry in mi, 07-24-2007 18:14:11  
No shocks on a truck like this. These old gals only had springs!



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Owen Aaland

07-24-2007 17:00:57




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 Re: What is is causing this to happen to my tires? (picture) in reply to e, 07-24-2007 16:14:29  
Mismatched tire size. They are probably marked as the same size but due to manufacturing variances they end up with a little difference in circumference. This happens more often with recaps than virgin tires. The larger tire will carry more load and have more traction. The difference in distance traveled each revolution causes the smaller tire to slip just a bit making it wear faster which just makes the problem worse. Difference in air pressure will also affect tire circumference. When replacing tires get all four ready and then match the two largest on one side and the two smallest on the other side.

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No tools

07-24-2007 17:00:10




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 Re: What is is causing this to happen to my tires? (picture) in reply to e, 07-24-2007 16:14:29  
Not enough air.And it appears that you drive a lot of crowned roads.See what happens is that tire with 65-70 or etc on air is working all the time while the outer is not doing as much carrying.A low tire will dip and whip it self to death.Ask you tire man.That tire i asume to be 900.20 should carry at least 90-100 psi.For some time the recommended tire chart may not be enough depending on YOUR application not the tire maker.Take a bare bias tire put it on the concrete apply pressure down on it see that the center of the tire on bottom will rise.That tire is doing the same thing on your truck.AIR AIR Enough Air will not kill a tire Low air Does.

Bill

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iowa_tire_guy

07-24-2007 19:20:58




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 Re: What is is causing this to happen to my tires? (picture) in reply to No tools, 07-24-2007 17:00:10  
Inflating an old split ring rim over 80 psi is asking for a death wish. It really doesn't matter what the tire is rated for, it's the rim that blows apart. A 900-20 inflated to 70 psi will carry all the tire is rated for.

As for the wear pattern I see it everyday. It is a simple cure even simple people can do. Get the gauge out and use it at least twice a week when the truck is in use.



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e

07-24-2007 20:33:40




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 Re: What is is causing this to happen to my tires? (picture) in reply to iowa_tire_guy, 07-24-2007 19:20:58  
I checked the air pressure tonight and the inside and outside tires on both sides read the same (55 psi). I just got the truck so who knows what happened during it's life. I'm going to get a new set of tires and wanted to make sure I knew what was going on before installing them. If you are the tires guy, by chance do you have a good set of used 9.00x20's?

Now I see several people mentioned rotating tires. What is the correct pattern for a truck like this? Obviously, the fronts won't go to the back.

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Don-Wi

07-25-2007 00:02:40




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 Re: What is is causing this to happen to my tires? (picture) in reply to e, 07-24-2007 20:33:40  
Not familiar at all with that truck, but for a rotation pattern, I would probably just swith the inside & outisde tires around, but keep them on the same side as they came from. Then they'll be switched around and be turning the opposite way they were before, and they have a chance to even out a little. Or maybe just move the outsdie one on one side to the outide ion the other, and shift the rest all over one.

If you can switch the front's & rear's, I hink the pattern is to put the outsides in, insides on the front, and fronts out.

Donovan from Wisconsin

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No tools

07-24-2007 19:27:31




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 Re: What is is causing this to happen to my tires? (picture) in reply to iowa_tire_guy, 07-24-2007 19:20:58  
Your right being the tire man but my gauge read 90-100 in my long life tires short life tires reads as low as nothing.I'll air to my own judgement on the load on the tire.

Bill



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iowa_tire_guy

07-24-2007 16:58:19




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 Re: What is is causing this to happen to my tires? (picture) in reply to e, 07-24-2007 16:14:29  
The tires are not inflated to the same pressure. Even 5 psi difference will cause the lower pressure tire to cup, which is what you are seeing.



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Ed Hodge

07-24-2007 16:25:12




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 Re: What is is causing this to happen to my tires? (picture) in reply to e, 07-24-2007 16:14:29  
tires are way too hard



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e

07-24-2007 16:16:08




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 Re: What is is causing this to happen to my tires? (picture) in reply to e, 07-24-2007 16:14:29  
third party image

Here is the picture.



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Keith-OR

07-24-2007 19:24:42




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 Re: What is is causing this to happen to my tires? (picture) in reply to e, 07-24-2007 16:16:08  
Allan is correct. I have always called that wear pattern as "heal and toe". I'd almost bet those came off the front of a 4-wheel drive. It is a MUST to rotate the front tires to the rear on a 4-wheel drive vehicle....

Keith & Shawn



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Allan In NE

07-24-2007 16:52:07




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 Re: What is is causing this to happen to my tires? (picture) in reply to e, 07-24-2007 16:16:08  
"Scalloped" tires result from not being rotated.

Allan



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