Didn't realize my pedal was lose and rode about a mile and a half with it. After I walked it home I realized the threads were all stripped on the pedal crank. Any suggestions on best way to fix this? Any resources you would recommend? Thanks for the help
by cananon
4 Comments
Ouch, less than half remaining, and some of that is likely deformed. Optimally you’d want to just give up and buy a replacement arm.
You can try and clean up those threads with a chaser, and hope there’s enough remaining… But they’ll eventually collapse again when you’re really cranking it. To have any chance of dependability, you’ll want to attempt a helicoil repair after cleaning, which would fill in the gaps nicely, but the material may be too soft to prevent wobble and further breakage.
I put grease on my pedal threads and make sure to torque them down good and tight. As long as there’s a thin layer of grease or anti-seize, there’s no chance of the pedals fusing to the crank (along with stuck seatposts, my biggest fear when getting my hands on any old bike).
Some shops might be able to repair by adding a helicoil, they work berry well, I’ve done something similar to a pair of Miche primato cranks, but I used the threads of another crank to make my own threaded insert, a good amount of red locktite and that thing is going nowhere, there are some cranks that come from the factory with something similar, generally with a small pin holding the insert in place
It all depends on how much it costs to replace vs fix
Accidentally just found an excuse to buy yourself that new fancy chainset you have been looking at.
Try to chase the threads first. Might be salvageable.