Failure of self-extracting crank bolt

Only once, but that was my fault. I let the cap nut get too
loose in the crank arm.

Now I always check the cap to be sure it's screwed in tight
BEFORE removing the crank. If it looks like it's becoming
striped, I carefully unscrew it and use a regular extracting
tool, which has more thread length. Again, carefully.

- - "May you have the wind at your back. And a really low
gear for the hills!"

Chris Zacho ~ "Your Friendly Neighborhood Wheelman"

Chris'Z Corner geocities.comczcornerOpen ↗

MGS said:

Has anyone else had problems with these self-
extracting bolts?

I had trouble with some on some old Campy Victory cranks.
The bolt and the cap separated, so that it no longer
extracted.

--

David L. Johnson

__o | More people object to wearing fur than leather
because it is _`\(,_ | safer to harrass rich white women
than motorcycle gangs. (_)/ (_) |

MGS said:

On extracting the drive side crank on a pair of FSA
compact cranks, the self extracting bolt stripped and
pulled out of the crank arm.

The end result was damage to both the self-extracting
cover of the bolt and the crank arm.

My LBS was kind enough to realize that the extracting bolt
either was defective, or the system is defective. In
either case, they replace the crank arm and I am now using
the standard crank extractor.

Has anyone else had problems with these self-
extracting bolts?

Yes. They are very tight and completely dry on new bicycles.
We shoot oil under the cap before extraction of factory new
bike cranks. At assembly, we lube all the faces and threads.

--
Andrew Muzi www.yellowjersey.org Open every day since 1
April, 1971