The Improbable Bulk
Join Date: Jul 2005
Location: Wilkes-Barre, PA
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Most one piece cranks are the same, other than a shorter size for kids bikes and a few older ones with different threads.
They are easy to replace... With a large adjustable wrench you should be able to do it.
I just searched Harris Cyclery, and they have one piece cranks for as low as $18... I am not sure of total cost, but I would be surprised to pay more than $50 for everything.
However, unless the bike is worth more than that, or has sentimental value, I would say you would be served best to either find a used crank somewhere (eBay etc) or buy a replacement bike for your backup from the thrift store (maybe $20 or $25 for a whole bike depending on your area).
If you sell it, you should probably sell it cheap as a parts bike, since if it is not worth you fixing, it is probably not worth someone else fixing.
If it were mine, I would find a cheap used crank, donate it to an organization that repars bikes and could use the parts (not a thrift store) or dump it.
Slow Ride Cyclists of NEPA
People do not seem to realize that their opinion of the world is also a confession of character.
- Ralph Waldo Emerson