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Old May 11, 2014 | 09:52 AM
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Default Small tire bulge

I am noticing a slight bulge in the sidewall of my left front Michelin AS+ (non runflat). The others do not have this issue. Is this evidence of a belt problem and should I replace the tire now?
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Old May 11, 2014 | 09:54 AM
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Originally Posted by stevegray04
I am noticing a slight bulge in the sidewall of my left front Michelin AS+ (non runflat). The others do not have this issue. Is this evidence of a belt problem and should I replace the tire now?
YES !!!

Get it checked. You definitely have an issue that will NOT go away.
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Old May 11, 2014 | 09:57 AM
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Originally Posted by ALLEGRO
YES !!!

Get it checked. You definitely have an issue that will NOT go away.
Depending on what you mean by "slight bulge", it could easily be tread belt separation. It needs attention asap.
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Old May 11, 2014 | 09:59 AM
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I would get that tire looked at right away. Hopefully they will cover it under a factory warranty.
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Old May 11, 2014 | 10:11 AM
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Thanks for all your prompt replies.

1. I should probably replace the tire. I assume I should replace both fronts so the tread wear will be the same.

2. Is there a problem with replacing the fronts with Hankook Ventus EVO rather than Michelins and not replacing the rears? The Hankooks are significantly cheaper than the Michelin and they get good reviews here.
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Old May 11, 2014 | 10:29 AM
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A lot of tires, including new, have a slight bulge in the sidewall if you look at the right angle. More like a small ripple. Have it looked at and ask a tire professional. They may want to sell you a tire, but try to find someone you trust.
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Old May 11, 2014 | 10:50 AM
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The tire is ruined.
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Old May 11, 2014 | 01:06 PM
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Check for a bend in the wheel in the same area
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Old May 11, 2014 | 01:16 PM
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Originally Posted by stevegray04
I am noticing a slight bulge in the sidewall of my left front Michelin AS+ (non runflat). The others do not have this issue. Is this evidence of a belt problem and should I replace the tire now?
I had the same thing with one of my Michelin Pilot AS's non run flats. The tires had less than 5,000 miles on them, and it was the manager at America's Tire who noticed it while the car was in for a routine balancing. It was so barely noticeable that I don't think I would have caught it. They replaced the tire under warranty immediately.
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Old May 11, 2014 | 01:21 PM
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The tire companies used to call them "undulations" and said they were normal in any radial tire. That is complete BS. Something has happened in the tire that needs to be addressed with a replacement tire before you experience a catastrophic failure of the subject tire.
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Old May 12, 2014 | 08:12 AM
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Originally Posted by stevegray04
Thanks for all your prompt replies.

1. I should probably replace the tire. I assume I should replace both fronts so the tread wear will be the same.

2. Is there a problem with replacing the fronts with Hankook Ventus EVO rather than Michelins and not replacing the rears? The Hankooks are significantly cheaper than the Michelin and they get good reviews here.
I appreciate everyone's feedback on this. Please weigh in on my questions above. Thanks.
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Old May 12, 2014 | 09:11 AM
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Originally Posted by stevegray04
I should probably replace the tire. I assume I should replace both fronts so the tread wear will be the same.
It would depend on how worn your tires are, if they more than 1/3 worn I would replace both tires, but it is completely up to you. You should be getting the faulty tire replaced under warranty, so that only leaves the other front tire to buy.


Originally Posted by stevegray04
Is there a problem with replacing the fronts with Hankook Ventus EVO rather than Michelins and not replacing the rears? The Hankooks are significantly cheaper than the Michelin and they get good reviews here.
I have tried the Hankooks, and they are a fine tire. They are a harder ride than the Michelins, and a little noisier, but fine tires. Personally I rate the Michelins so good that I think it is worth paying the extra money for them. I would go for the Michelin Pilot Sport A/S 3's non run flats.


Originally Posted by stevegray04
Is there a problem with not replacing the rears?
Here again it would depend how worn your current tires are. I'm sure you would have no problem putting new tires on the front and leaving existing tires on the back, or mixing Hankooks front with Michelin rears.

.
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Old May 12, 2014 | 07:15 PM
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Originally Posted by allred
It would depend on how worn your tires are, if they more than 1/3 worn I would replace both tires, but it is completely up to you. You should be getting the faulty tire replaced under warranty, so that only leaves the other front tire to buy..
Since those were the tires that were on the car when I bought it, I doubt that there's a warranty claim.

I like the Michelins too, but they may not be in the budget right now.

obnoxus: I looked at the rim and did not see any bend.
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Old May 13, 2014 | 09:14 AM
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Originally Posted by BADBIRDCAGE
The tire companies used to call them "undulations" and said they were normal in any radial tire. That is complete BS. Something has happened in the tire that needs to be addressed with a replacement tire before you experience a catastrophic failure of the subject tire.
Undulations are not bs. Usually they are concave type. Meaning they look like a trough. Most likely this particular one is a broken sidewall band in the tire which is allowing air to get between the inner liner and outer rubber of the tire. Would need to see a picture of it to tell. To determine if it is a manufacturer warranty the tire needs to be removed and inspect the inner liner for a tear from an impact.
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Old May 13, 2014 | 09:18 AM
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Undulations explained

Last edited by mrr23; May 13, 2014 at 09:22 AM.
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Old May 15, 2014 | 06:01 PM
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I lied to you all, my Forum friends.

In Post #1 about this problem, I said that the tires are not runflats, but they are. I checked with my local Goodyear store which I've used for the last 30 years and they confirmed that the problem is a belt separating in the sidewall. They also showed me the "zero pressure" on the sidewall. There isn't enough tread to replace only the one tire, so I'm pricing for two. Tire Rack wants $268/tire while Goodyear wants $290, but they will price-match. Goodyear's nationwide road hazard is $58 for two tires while Tire Rack's is $106.

I'll keep my driving local and low-speed until I replace the tires.
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Old May 15, 2014 | 09:10 PM
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Originally Posted by stevegray04
I lied to you all, my Forum friends.

In Post #1 about this problem, I said that the tires are not runflats, but they are. I checked with my local Goodyear store which I've used for the last 30 years and they confirmed that the problem is a belt separating in the sidewall. They also showed me the "zero pressure" on the sidewall. There isn't enough tread to replace only the one tire, so I'm pricing for two. Tire Rack wants $268/tire while Goodyear wants $290, but they will price-match. Goodyear's nationwide road hazard is $58 for two tires while Tire Rack's is $106.

I'll keep my driving local and low-speed until I replace the tires.
Check the price for a set of Hankooks, you'll be much happier. You can have a set of 4, for what 2 will run you.
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