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This is the reason I like to do my own wrenching, cleaning and polishing every couple of weeks or after a long ride. Good catch! Glad you noticed and are able to take corrective measures. I have never seen this on a tire before.
Nothing that was noticeable, its not an even or clean split like a piece of metal or glass would leave behind, just looks like the rubber is splitting apart? I'll be pulling the wheel tomorrow and into the shop Monday for a new tire, was looking at the commander IIs but didn't figure on them so soon!
It looks to me like it got stretched over an uneven piece of metal or something and it ripped. Just a tear from road debris. The tire is getting old and it might not take much to tear it.
I had the same thing happen to a Dunlop tire on the rear of my Dyna. I had 4 cracks like that and all were in the same area of the tread as yours. Dealer replaced it for me due to being less than 6 months old and less than 3K on it. I never did figure out what caused it.
I had the same thing happened on my Heritage, but it was an older, stock, tire. Tread was low, but I didn't see any other damage to the tire, so sidewall cracking or bruising.
Imagine my suprise to find this thread! I just took a trip from this weekend (Friday - Saturday, May 5th and 6th 2012) Leaving Omaha to Kansas City and returning. On the way down no problems, but on the way back I picked up a vibration that was getting worse. We stopped and while checking tires I found that the rear tire (Mich MT90B16) has cracks all the way around the tire. Where yours are opposite of the tread, mine are with the line of tread. I think this is too much of a concidence to ignore. The cracks were not there when I did my pretrip inspection, including air pressure. My bike is a 06 Electra Glide, I was riding solo and packing light with only a backpack and sleeping bag as cargo so I was not over weight. My front tire is also a Commander and put on at the same time. Both were done last year, about 6K ago, and no I did not hit or run over anything.
These were taken with my phone, but you get the idea.
Imagine my suprise to find this thread! I just took a trip from this weekend (Friday - Saturday, May 5th and 6th 2012) Leaving Omaha to Kansas City and returning. On the way down no problems, but on the way back I picked up a vibration that was getting worse. We stopped and while checking tires I found that the rear tire (Mich MT90B16) has cracks all the way around the tire. Where yours are opposite of the tread, mine are with the line of tread. I think this is too much of a concidence to ignore. The cracks were not there when I did my pretrip inspection, including air pressure. My bike is a 06 Electra Glide, I was riding solo and packing light with only a backpack and sleeping bag as cargo so I was not over weight. My front tire is also a Commander and put on at the same time. Both were done last year, about 6K ago, and no I did not hit or run over anything.
These were taken with my phone, but you get the idea.
Starting to look like those Commander tires have a weak spot. The OPs picture looks like something was forced on it suddenly, yours looks like it is weak due to age and wear. Either way they seem to give in the same area a lot. They should never do that. They should just wear until there is no more tread, assuming the tire does not get too old. Like Steve Martin said in The Jerk. Stay away from the Commander Tires.
Rubber gets "hard" as time goes by, so a good looking old tire is no bargain and does not grip as well as a new, softer tire. Old good looking tires lull us into a false sense of security sometimes. (kinda like old good looking broads!)
Sorry to see the Michelin quality going to the dogs. That's certainly not typical for this brand.
I am sure that Michelin would like to see those photos. They have a lot riding on their reputation, literally.
Rode to Utah last summer from Maine. My buddy had brand new Metzlers when leaving home. got to Utah and his rear was split worse that that. (yes, pressure was correct, it was new, it was balanced). Had 170 miles to dealer, they slapped on two Dunlops (no Metzlers in stock) and we were on our way.
We were standing in the hotel parking lot having coffee one morning and I just asked "how do you like the Metzlers?" and bent over to look at them and there it was... big split.
Imagine my suprise to find this thread! I just took a trip from this weekend (Friday - Saturday, May 5th and 6th 2012) Leaving Omaha to Kansas City and returning. On the way down no problems, but on the way back I picked up a vibration that was getting worse. We stopped and while checking tires I found that the rear tire (Mich MT90B16) has cracks all the way around the tire. Where yours are opposite of the tread, mine are with the line of tread. I think this is too much of a concidence to ignore. The cracks were not there when I did my pretrip inspection, including air pressure. My bike is a 06 Electra Glide, I was riding solo and packing light with only a backpack and sleeping bag as cargo so I was not over weight. My front tire is also a Commander and put on at the same time. Both were done last year, about 6K ago, and no I did not hit or run over anything.
These were taken with my phone, but you get the idea.
...looks like your rear seat fastner is rubbing your tire...possibly when you are two-up and loaded with luggage. I had that to happen riding two-up on a RK that was lowered and too long of a seat bolt...
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