The origional nut is a 12mmX1.25 pitch. I would get the die and try to tap the same threads first. I know of one person who tried to cut threads to the next smaller size by using a die grinder but it did not work and he ended up replacing the crank. The problem will be grinding it down evenly so that it is not off center or you will have one heck of a vibration, which is what happened to the person spoken about earlier. It will throw the crank out of balance. The next size down from 12mm is 10mm which is a tad more then a 1/16". It could be done with tons of patients and planning but I would first try to revive the origional threads first then use some blue loctite on the threads.
Last edited by SYCARMS; 08-02-2012 at 10:29 PM.
Reason: to add content
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