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My derailleur hanger snapped mid-ride on a gravel descent

I was coming down this steep gravel section near my place about two weeks ago, shifting down for a corner, and then just *clank* the whole derailleur got sucked into the spokes. Turned out the hanger had a hairline crack I never spotted during my regular cleanings. Had to walk about a mile to a gas station and call a buddy for a pickup. I now keep a spare hanger in my saddle bag, but does anyone have a trick for catching these cracks before they let go?
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2 Comments
kevin_carr
kevin_carr9d agoTop Commenter
Saw a mechanic on YouTube recommend using a magnifying glass and bright flashlight after every big ride. That's what I do now on aluminum frames and hangers.
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joseph_coleman
Spray some wd40 and flex the hanger gently while looking for paint cracks.
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