Bicycle Mechanics - Chain slips off when I backpedal

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purple hayes
03-15-04, 06:57 AM
When I'm sitting at a stop light/sign and back pedal, the chain will slip off the biggest chainring. What do I need to adjust to fix that?

Bike setup :: Double up front and 9 speed on the back. Full Ultegra with bar-end shifters.

KleinMp99
03-15-04, 06:58 AM
When I'm sitting at a stop light/sign and back pedal, the chain will slip off the biggest chainring.

Ummmmmmmm...............dont back pedal??
el Inglés
03-15-04, 08:32 AM
Sounds like your using the top part of the cassette ( last couple of cogs ) instead of shifting down to the inner ring , as David Millar learned that ain´t the way to do it .
( could check chain line though , if it´s too far to the outside that might cause something similar : length of bottom bracket )

lotek
03-15-04, 12:01 PM
Try lubing the freehub.
I found that when my freewheel/cassette whatever
needed to be lubed (it was quite dry) I would drop the
chain when backpedaling.

Marty
leadbutt
03-15-04, 08:04 PM
Like lotek said...check out your freehub/freewheel...I had a similar problem last summer before I just bought new wheels...the freewheel would actually stay engaged after I stopped pedaling, causin' the chain to "snap&sling"...made for problems on rooty downhills, too...