My cranks have just turned by themselves.
Ive got the bike on the stand with the wheels and chain off, in prep for polishing and a wheel change.
Its been sitting on the stand for a good hour,by itself, doing nothing. I had been spinning the cranks to check out a bend in the outer ring but that was the hour ago and ive been sitting gaming since(commitment eh?).
Im sitting here at the desk and the bike is hanging 7' away. I have no windows open and the house is pretty much sealed.
Then for no apparent reason the cranks spun a full turn then started the rocking back and forth as they do with the chain off. ( im now glancing at it all the time to see it it does it again
OK thinking it could have swung on the pendulum till it settled before, but it runs really smoothly and it couldnt have finished settling with the weight at the top
So what caused it to turn a full turn. Perfectly balanced maybe?? A fly settles and that sends the weight down,it carries over the top but without force behind it(flew away) it cant complete a 2nd turn.http://www.youtube.com/watch?v=XVSRm80WzZk
1976 Raleigh Chipper,1991 Muddy Fox Adventurer, 1992 Raleigh Diablo ,1992 Rudy Project, 1995 Cannondale M200 ,1997 Santa Cruz Tazmon ,1997 Specialized Stumpjumper ,1997 Specialized Rockhopper ,1997 Marin Quake 9.0,1998 Marin Pallisade trail ,1998 Raleigh Torus,1999 Orange Clockwork , 2005 Kona Hahanna , 2010 Orange Pure7
The Marvellous Mechanical Hope Collection