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  1. Ungreasedaxle45again on

    Could have been a pre existing cracked and the material just gave in also cool that you took your microwave to photograph the picture.

  2. Yes.

    How old were the bars (and were they heat treated if aluminum)? Bars experience a considerable amount of stress cycling, which can result in micro-fractures setting up in the bars at the bar/stem clamp stress riser over time and usage. Eventually, these micro-fractures grow larger, join up, and become a full-blown catastrophic fracture.

    Heat treated bars are more resistant, but all bars can be driven past their fatigue points given enough time and force, and bars on fixed gear bikes see a lot more force than multi-geared bikes, so they’re even more likely to fail.

    I have a buddy who rode across the North American continent, west to east, a couple of years ago. His bars snapped two days from the Atlantic Ocean, and a mere one day after having descended from the Appalachian Escarpment at speeds exceeding 50 mph. He stood to power over a small hill and the bars snapped on the pull. He went down at 15 mph, luckily not badly hurt. Had it occurred while he was descending the Escarpment, I may well have attended his funeral. He was exceptionally lucky.

  3. Clean your phone. It almost happened once, in my youth. I was stuck about twenty miles from home and missed the last bus. I jacked one of those old walmart mtbs with the painted bars. It was that night I found out the sidewalk I took ended on the side of the street, and in a flight of steps. One “oh shit” last minute jump had one end bend 45° down on landing. Thought I was about to eat it. Looking back, I should have.

    I had the chainring peg snap on a beach cruiser, too. A few days after I had ridden it all the way to Lexington KY. I rode over my girlfriends house, pulled in the driveway, heard a *plink* and ran right into the backyard retaining wall. Bent the forks back. Frame was fine.

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