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Crank came off while riding!(11 posts)

Crank came off while riding!SamDC
Sep 6, 2001 1:36 PM
Commuting to school today, I was sprinting and all of a sudden my non-drive side crank came off the B.B. My chest landed right on the stem. Now, everything time I take a moderately deep breath my chest hurts. Has this ever happened to anybody else, and if so, how long does the pain last? Thanks!
re: Crank came off while riding!nee Spoke Wrench
Sep 6, 2001 2:30 PM
I don't know how long the sternum pain lasts. I do know that left crank arms (it's almost always the left side)coming off is a fairly common issue.

I think that when the bikes are pre-assembled on the assembly line in the factory the drive side faces the workers. When the guy puts the left side crank arm on, he doesn't torque it quite as well as the right side. When the bikes get assembled at the LBS, they should check crank arm torque, but it doesn't always happen.
you shouldaMaster of the Obvious
Sep 6, 2001 2:31 PM
you shoulda checked tightness more often. It had to be WAY loose to fall off. Your fault I'd say.
shoulda, woulda, didn'tSamDC
Sep 6, 2001 2:44 PM
I know. Thanks. Just looking for some sympathy and maybe some Advil.
Boy, I hate it when that happens....MrCelloBoy
Sep 6, 2001 2:59 PM
It will probably hurt for a few weeks or more if you bruised a rib or ribs.
DOH!
I broke a peadl off once, but the revolution before it began to bend so I was slowing during a MTB climb.
Escaped unharmed. HOWEVER, another time, drunk and intoxicated, I bottomed my front shock on a dip and went over the bars bruising my ribs. It seemed hell-arious at the time. Imaging how bad my injuries might've been had I NOT been relaxed!
I guess it's a learning experienceSamDC
Sep 6, 2001 3:27 PM
This will teach me to check my bolts every week instead whenever I feel like it. This brings me to another point, I wonder what kind of responses I would've gotten if I posted on mtbr.com. Maybe not as... nice?
Maybe something like...MrCelloBoy
Sep 6, 2001 3:31 PM
Yeh ya schwammin wagbag. You gets whut you deserves, scuh guh guh guh guh guh.
Maybeez it'll be the stem nextime!

Dat's all I can stands and I can't stands no more!
go see the school nurse!dm
Sep 6, 2001 4:13 PM
or infirmiry, student health, etc.
similar experienceDuane Gran
Sep 6, 2001 5:54 PM
I had a similar experience, but the crank loosened and slipped about 60 degrees. It was very disorienting and I nearly fell onto the front of the bike also. It happened while I attacked on a hill in a training ride out in the boondocks (Adamstown). Fortunately a teammate had one of those tool kits that fixes everything and makes breakfast for you too, so we were able to tighten it down enough for me to ride home. Since then, I have picked up an 8 mm alan wrench and occassionally give a tug on the crank and make sure it is nice and tight.

Incidentally, by your screen name (SamDC) shall I assume you live in the DC area? If so, let me know if you are interested in doing some training rides with my team.
Have daddy check the bolt torque next time!Rusty McNasty
Sep 7, 2001 5:40 AM
You mean you NEVER noticed that the crank was flopping with every stroke (as it MUST HAVE ben doing)?? Geez, If you are THAT unobservant, I'd be worried about being hit by a truck while riding!! You obviously don't notice ANYTHING!
What else is falling off your bike? Are you sure that the saddle is still there? What about the wheels? I'd make a checklist, and check it off every time before a ride if I were you.
Broke my sternum once in a car crash.......Len J
Sep 7, 2001 9:00 AM
pain lasted 6 weeks. It hurt to breath deeply & the worst was sleeping. If it's not this bad, gauge time accordingly.

Len