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Old 04-11-24, 12:52 PM
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gspremington
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Originally Posted by Iride01
What do you think you stripped out? The threads in the end of the spindle or the threads for one of the two pinch bolts on the crank arm.

Do you know how to properly install a crank arm on a two piece Shimano crankset? There is a stopper plate on the arm that tells you if the arm is on the spindle far enough before you begin to tighten the pinch bolts.

Here is the DM for those cranksets. Page 24 tells you how to put the arm on and how to pull it down on the spindle. Page 25 tells you about the stopper plate. PROVIDED LINK REMOVED.

As another mentioned, that arm is for multiple types of crank part numbers.
I stripped out the pedal to crankarm. Must have cross threaded. Thanks will consult the linked install manual when the replacement part arrives.

Originally Posted by Andrew R Stewart
Have you asked any bike shops if they can install a Helicoil? Some shops are good with this repair method, others would rather just sell a new arm. When done properly a Helicoil is stronger than the OEM threads. Andy
Good to know. I did not consult and had (incorrectly) read that repair was not as strong as new. The replacement part is sub $50 so I did not think I'd find a service provider for less but should have looked.

Originally Posted by Bill Kapaun
The 6100 is a series and likely covers doubles & triples? maybe even 1X?
The left arm would be the same for all, since there are no chain rings to mount.
175mm is the length.
Yes, makes sense on 1,2,3x chain rings. Mine is single. I was thrown off as Shimano's online pictures show the right crankarm (no mounting bolts) where as the left arm does have them.

Last edited by gspremington; 04-11-24 at 12:53 PM. Reason: expanded answer
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