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Using stripped cranks?

Old 03-31-20, 09:55 PM
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disco_kevin30
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Using stripped cranks?

I have drilled Stronglight cranks that have a fairly stripped bolt area. The threads are semi present, but they definitely dont look good and I plan to order the proper remover so I can ascertain if they are completely ruined or moderately functional. I think I have decided to use them anyway on an upcoming build (Peugeot PKN 10) because they are otherwise in perfect shape. My logic is, I may as well use them and just count on having to destroy them at a point in the future vs not using them at all and just recycling them. I dont mind having to resort to worst case scenario removal if I can get some more life out of them. Has anyone else here knowingly used a part that was damaged and resigned themselves to dealing with a potential hassle down the road?
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Old 03-31-20, 10:01 PM
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Russ Roth
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Yup, and it was a BB on a 20 year old kid's bike. Since it will get handed down to another kid I might end up having to deal with it but I suspect it'll be someone else's problem in 20 years. The bike is only for them to ride to school and loan to friends for joining us on rides and its not like those threads do anything to hold the crank on.
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Old 04-01-20, 04:35 AM
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You can always get the cranks off with a pair of Jacobs chuck wedges.
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Old 04-01-20, 07:04 AM
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Moe Zhoost
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Originally Posted by dsbrantjr View Post
You can always get the cranks off with a pair of Jacobs chuck wedges.
Or with a pickle fork.

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Old 04-01-20, 08:25 AM
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Can I rethread a crankarm?

https://www.bikeforums.net/13293342-post15.html

https://www.steintool.com/portfolio-...ractor-system/

...it took me years to find someone selling of these, and I can't remember who it was. I have had trouble ordering the replacement adapters that refit your crank to standard. But as long as I have the oversized puller, I can just use it to pull those crank arms that have been rethreaded oversized. It is expensive, and you need more than one Stronglight stripped crank to justify purchase. It's a great tool, but it's too bad they are so difficult to come by.

Anyway, there are some other solutions in the linked old thread above.
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Old 04-01-20, 08:40 AM
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Used with some caution, Jacobs chuck wedges are a non-destructive, non-damaging way to remove a square taper crank. The wedges are relatively inexpensive and available from any industrial supply house or even on Amazon. I believe the #6 taper is the recommended size.
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Old 04-01-20, 09:07 AM
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Dan Burkhart 
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Originally Posted by 3alarmer View Post

Can I rethread a crankarm?

https://www.bikeforums.net/13293342-post15.html

https://www.steintool.com/portfolio-...ractor-system/

...it took me years to find someone selling of these, and I can't remember who it was. I have had trouble ordering the replacement adapters that refit your crank to standard. But as long as I have the oversized puller, I can just use it to pull those crank arms that have been rethreaded oversized. It is expensive, and you need more than one Stronglight stripped crank to justify purchase. It's a great tool, but it's too bad they are so difficult to come by.

Anyway, there are some other solutions in the linked old thread above.
It can be purchased directly from Jim Stein. The guy is a real gentleman. Answers the phone himself and always willing to help.
I have one and it works great.
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Old 04-02-20, 10:43 AM
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You can always ride it as it is, eventually the crank arm will simply fall off, that will be the time to change it
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Old 04-03-20, 11:32 PM
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disco_kevin30
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Thanks for all the advice. The wedges look like a good way to take care of this particular situation. I may pick them up instead of the Stronglight puller due to the cost difference, anyway. Good call on those! I have heard of gear pullers and riding with the crank bolt removed which is why i just assumed there would be destruction/major hassle involved. I am getting pretty pumped about this build! I have Swiss bb and I wasnt sure if it was the right spindle width but I did a test fit and it looks like its going to work; they sit a little inboard but no rubbing or anything so i am just going with it. Thanks again for the replies!
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