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Tramllining issue with Michelin PS2s

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Old 05-26-2011, 08:49 PM
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I bought these tires for my 2007 530i/sport, and right out of the gate, I'm getting a bit of tramlining on the freeway.

Tire pressures and alignment are all within factory spec. These tires are the special Y97 heavy duty version (as compared to the normal Y93).

Michelin as a 30 day return privilege, but I'm still stuck with RT shipping with Tire Rack and additional remounting costs.

Has anyone experienced this issue with these tires or other PS2s?
Old 05-26-2011, 08:54 PM
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Size tires?

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Old 05-27-2011, 06:08 AM
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Size is the same as factory originals - 245-40-18
Old 05-27-2011, 06:48 AM
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Any particular reason why you went for the 97Y instead of the 93Y? Tyre Rack lists the 97Y for Audi and the 93Y for BMW.Sidewalls must be stiffer so that could be the reason.
Old 05-27-2011, 06:59 AM
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Price. The 97Y was about $200 cheaper. I knew I was getting a slightly stiffer sidewall, but I wasn't expecting the tramlining issue. I may replace them with the new Supersports, but I want to be absolutely sure this doesn't repeat.
Old 05-27-2011, 07:23 AM
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Originally Posted by tooltec
Any particular reason why you went for the 97Y instead of the 93Y? Tyre Rack lists the 97Y for Audi and the 93Y for BMW.Sidewalls must be stiffer so that could be the reason.
The slightly higher load capacity shouldn't contribute to tramming. If not resulting from suspension issue or mal-alignment that typically is caused by a tire construction/manufacturing issue. And, it may be only one tire that is the culprit. Before shipping everything/anything back to TireRack maybe an authorized Michelin Dealer can investigate the problem. If it's a bad tire that warranty issue should / could be handled by an authorized Michelin dealer.
Old 05-27-2011, 08:13 AM
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you need to play with tire pressures until you get what you want. the pressures listed in the door jamb are for the run flats. you will need more pressure than that. I run my fronts at 38 and rears at 40, but my rears are 275s.

HTH
Old 05-27-2011, 12:41 PM
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What is the symptoms of tramlining. Im not sure I have ever experienced it
Old 05-27-2011, 06:06 PM
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Originally Posted by Veight
What is the symptoms of tramlining. Im not sure I have ever experienced it
The car goes offline as a result of following ridges or ruts in the roadway. If you're always on flat, smooth roads, you won't notice it.
Old 05-27-2011, 09:24 PM
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Vehicle was aligned at the same time, and I checked the printed report to make sure the toe and camber were within spec.

The installing dealer is Michelin authorized. Interesting that one tire could be bad -- I thought the issue was inherent in the design of the tire. I'll try rotating front to back.

>>
The slightly higher load capacity shouldn't contribute to tramming. If not resulting from suspension issue or mal-alignment that typically is caused by a tire construction/manufacturing issue. And, it may be only one tire that is the culprit. Before shipping everything/anything back to TireRack maybe an authorized Michelin Dealer can investigate the problem. If it's a bad tire that warranty issue should / could be handled by an authorized Michelin dealer. <<


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