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Pedal popped off...Am I screwed?(4 posts)

Pedal popped off...Am I screwed?Tele_Pathic
Aug 2, 2002 7:44 PM
Ok, maybe this doesn't belong here, but hey...

I'm out for a ride tonight when suddenly the left pedal pops out of my crank arm. Luckily, I was able to steer to safety.
While examining the crank arm and pedal, I notice some metal shavings. I try to reattach the pedal but meet incredible resistance. Try again, same thing. Try a different set of pedals, same thing. Try some Pedro's grease, same thing. The pedal will seat itself, but as I tighten it up, it settles into an awkward angle and tightening the pedal becomes impossible.

So, here's my question: Are the threads on this pedal stripped? Is there an easy solution? Or do I need a crank
arm? Thanks in advance.

Tele Pathic
re: Pedal popped off...Am I screwed?szybki
Aug 2, 2002 9:06 PM
sounds like you need a new crank arm. Now you know why there are so many single arms listed on ebay...
crossthreaded...DrD
Aug 3, 2002 4:29 AM
Sounds like the pedal was cross-threaded when it was installed - sadly, you have just seen a demonstration that steel is indeed a whole lot stronger than aluminum... there are a couple of potential solutions - you could replace the crankarm, you could head down to the lbs and see if they have a tap, and if so, try to chase the threads - depending on how bad things are, it may be fixable (however, since th pedal pulled out, it's probably pretty bad), the third option would be to try a helicoil repair, if you could find one the right size/thread pitch, and have someone capable of doing the install on a crankarm...
What kind of crank, left or right crankarm?Spoke Wrench
Aug 3, 2002 5:11 AM
If you're not talking about a high end crank and if it's the left arm and if you aren't particular about the arms matching perfectly, the cheapest repair is to replace the left arm. Bike shops can get them. If it's a right, it's generally more economical to replace the whole crankset.

You can try to retap the threads, but I doubt it's going to work. If you do, be sure to run the tap from the inside surface of the crankarm outward. That way you'll get it started on the best threads nice and squarly.