paulandyael

My chain droops precariously when coasting; bouncing like mad on the chainstay. It's fine as long as I'm pedaling. Is the B-tension adjustment screw the solution or is something else going on?

thanks

Peedtm

Is this a new problem? Your chain might just be too long. Or you need a long cage derailer. Shift to your biggest rings. Still a lot of slack? You don't need it. Or if it's pretty much straightened out your rear derailer but slaps when in the smallest/smallest combo, then the arm on your rear derailer needs too be longer to take the chain slack up.

If neither, there's additional alignment issues it could be such as your chainring(s) being to small to keep the chain high enough.

paulandyael

It is a relatively new problem. The bike already has a long cage derailleur, and the chainring/cassette combo are as provided originally by cannondale. So, nothing has changed really. It may be the chain length; Ias I think about it, the problem wasn't there before the chain was replaced, but neither did it start immediately after replacing the chain. I'll look into it anyway. Thanks.

shider

Make sure your freehub spins (ratchets) smoothly. Push the bike along and see if the cranks are driven by the rear wheel instead of staying still.

operator

Sounds like the freehub needs some overhaul/replacement, or your derailleur/adjustment is messed.

tellyho

+1 on the freehub. Too much friction in there = delay in freewheeling once you've stopped pedaling = chain slack.

tedshuck

Are you riding in much colder weather than usual? The grease in your chain, freehub, RD, etc.., can make things much stiffer in cold weather. I have seen this when riding when the temperature is below freezing here. When the weather is warmer, I have no problem. Seeing you are from the LA area, this may be off base, but I know that it has been cooler and wetter than usual there lately.

paulandyael

Looks like it's probably the freehub. It's in the shop and I'll know in a couple of days. Thanks to everyone for your input.