Hambini Engineering featured on LawStreet: Shimano Crank Lawsuit

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I was named in the class action lawsuit brought by various claimants against Shimano and Trek. Some more on that will be coming soon in a YouTube video, but until then, you can read the full article here.

The author of the Law Street report did a cracking job of selecting the perfect annotated slide from the entire deck. This one might be above American visitors!

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You can see the Original Engineering Teardown below

And the follow up reaming after the recall was announced here

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  1. My crank failed. I feel the aluminum was not treated properly, thus making it prone to corrosion. Some people on line are stating that it is from improper cleaning (lack of). I’ve done testing on painted aluminum samples in a salt spray both and almost no creep or delamination at the end of the test.

  2. As a retired Corrosion Engineer w/ 2 of these cranks, I can’t believe Shimano made cranks from dissimilar metals. Wtf? Though, many engineers I’ve met were taught little about corrosion. Criminal.
    I would have never bought these cranks if I had known. I tried to join the lawsuit but no luck. Luckily, I don’t ride in the wet much anymore.
    Thanks for the information. Great job!

  3. You mentioned on Youtube that Shimano would not replace their unbroken crankset. I went to a bike shop and that’s what the shop did. My crankset was a Dura Ace 9100 with a Dura Ace 7900 left crank arm with a Stages power meter. Shimano gave me a Dura Ace FC-09. It is a crankset similar to the Dura Ace 9200 with modified tabs to attach the chainrings for spacing for an 11 speed cassette. I also received a $300 check for the 3rd party power meter.

    In the beginning, I was so surprised that the shop was so ready to do this for me. The mechanic/owner told me they have done this before, several times. He said in the USA we live in a litigious society and there’s no way a company should return the 9100 crankset since it’s known to be defective.

    The replacement took time, about 1.5 months. I am guessing that MANY people are doing the same thing. In the end, I have a brand new crankset. I sent the left crank arm to 4iiii to get a power meter installed, since Stages has gone bankrupt. According to a few reviewers, the two power meter companies have very similar performance and accuracy. I covered the crank with a thick clear sticker/tape to protect it from rubbing with the shoe and perhaps lowering the corrosion rate.

    So if anyone has a Shimano crankset eligible to get replaced, even if it’s not broken, go to a shop and let them send it to Shimano. It does take time but if you have another crankset (an older model) you can keep pedaling while you wait.