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Old 02-21-2012, 08:34 PM   #1
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Question Uneven tire wear

After about 46K miles, I noticed that my front tires are not wearing evenly.

This is Freightliner 2006 chassis (2007 Winn. Tour). I have a TPMS to monitor 100 lbs of cold pressure.

Normal wear of passenger side:


Excess wear of drivers side:



Any ideas? Simple alignment issues of hitting pot holes for the last few years?

It is at a local truck shop now where they are looking at it. Should have more info tomorrow.
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Old 02-21-2012, 08:36 PM   #2
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Looks like the front end is out of alignment to me. Should be around 175$ for one.
As bad as they look are you putting on new shoes?
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Old 02-21-2012, 08:46 PM   #3
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Definitely a front end problem. Your wheels are turned slightly to the left as you go straight down the road, scuffing the right edge of both front tires. Any front end shop should be able to fix that easily enough. Driver side tire may have been running a bit soft too, cause it appears the other edge is rather worn too. It looks like the driver side is due for replacement soon anyway, so maybe now is a good time?
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Old 02-21-2012, 09:06 PM   #4
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Gary,

You bring up an interesting point with the tires pointed to the left. I have a TruCenter and could that be a cause to the wear as the steering is not going back to center??

I was hoping to get another season out of these tires but may be taking the plunge to replace all as they are 6 years old.

Thanks to Gary and KJD for their input!
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Old 02-21-2012, 09:37 PM   #5
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Check Rear Axle

I would have them check the rear axle. It looks like the rear axle is pushing the motorhome down the road at an angle. One tire is going straight down the road, while the other is 'scrubbing" down the road and wearing.
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Old 02-22-2012, 05:40 PM   #6
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The Tru Center will not cause abnormal tire wear. Consider:
1. Swap the fronts for 2 good rear tires.
2. Have all the tires you changed position balanced.
3. Make sure ride height is set correctly.
4. Have the front end components checked to ensure they are in good shape.
5. Now it is time for the front end alignment. (two axle alignment is best).

The alignment should be done last, after all the other steps have been taken.
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Old 02-22-2012, 07:43 PM   #7
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Looks like the tire is scrubbing. Most common cause is incorrect toe adjustment.
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Old 02-22-2012, 08:32 PM   #8
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Repair shop said the front bearing is loose but they have to wait for the extended warranty company to give approval to take the wheel off and confirm.

Either way they will be doing an alignment and tire rotation.
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Old 02-23-2012, 11:09 AM   #9
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On mine both right side edges of the front tires were showing signs of wear and cupping (rivering?). I took it to a truck tire shop and they moved the front two to the inside rears. Also balanced all wheels and removed and washed out the powder that had been used as a balancing agent. These are Goodyear 670's that I had put on in August 2010 and now have 32,000 miles on them. I asked if they thought I had a problem with alignment and they said no, sometimes tires wear that way.
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Old 02-23-2012, 09:48 PM   #10
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A TruCenter could cause tire wear if it is not properly adjusted, i.e. the "center" is not really centered.
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Old 04-07-2012, 12:45 PM   #11
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OK. My coach has 40K on it. My front tires are cupping on the outer edge of both. Am I correct in thinking this is an alignment issue? Can I switch those tires to the back and if I do should I put them on the inside or outside? Why would it matter? All the tires have good life left in them. I have two axles....thanks!
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Old 04-07-2012, 12:54 PM   #12
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Scooby450 - For what it's worth - On mine they moved the fronts to the inside rears but I don't see that it would make a difference if they had put them on the outside rears. I had all tires balanced The dealer said on mine the wear was normal but not severe cupping. I could hear a slight flap flat sound when going down the highway. They said the sound would still be there but beings as it was near the engine I probably would not hear it and I don't.
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Old 04-07-2012, 02:36 PM   #13
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Interesting: When I had tires rotated, truck tire shop -moved both front tires to the left rear, and the 2 rear tires from that side to the front. "keeps tires with the same wear paired on the same end of the axle and tires now on the front still rotate the same direction as before" Also mentioned next rotation would be the front tires to the Right rear.
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Old 04-07-2012, 06:04 PM   #14
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Wear on the outer edge of both steer tires is probably too much toe in. Both tires are scrubbing the outer edges as it goes down the road. Check the toe in. You can check i yourself. Slap a piece of duct tap on each tire, on the front. Make a mark on each one. Then drive forward until the tape is on the back side of the tire, and measure the distance between the marks. It should be about 1/16 inch less on the front. Moving the tires around is not going to change how fast the tire wears. Once you can see a wear pattern, nothing will slow it down.
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