Thread: Chain Jam
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Old 05-16-20 | 05:05 PM
  #9  
Tourist in MSN
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Bikes: 1961 Ideor, 1966 Perfekt 3 Speed AB Hub, 1994 Bridgestone MB-6, 2006 Airnimal Joey, 2009 Thorn Sherpa, 2013 Thorn Nomad MkII, 2015 VO Pass Hunter, 2017 Lynskey Backroad, 2017 Raleigh Gran Prix, 1980s Bianchi Mixte on a trainer. Others are now gone.

Originally Posted by KC8QVO
Alignment issue (bent RD or otherwise)
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If you are having trouble seeing the chain alignment shifting put the bike on a stand and hand crank it slowly and watch the motion of the RD and chain alignment. Check the RD spring tension also. Too lose and the chain could be allowed to bounce too much.

Check the link count on the chain and see if it is identical to what you were using before. Chain length will affect the RD as it is also taking up the slack of the chain. Different length chains will give you different angles to the pulleys/cogs in the RD and could affect the shifting somehow.
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Yeah, do this. Assuming you do not have a bike stand, you can put the bike upside down on the ground to do that.

Or, hang it from a rafter in a garage from a rope.

If the chain is that new, maybe it is a couple links too short and you only found out about that now.
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