Hey all, so I have this issue with my new bike where the chain will excessively flop around when I stop pedaling at speed in the hardest gears. The chain has also completely dropped off a couple times when rolling over bumps at high speeds. Wondering if there’s some sort of tension I can adjust to solve this? I’ve added a short video as better explanation.

Chain is too slack?
byu/southern_wasp inbikewrench



by southern_wasp

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5 Comments

  1. Imho this is not a tension issue this is a freehub issue ( freehub stays engaged aund pushes the chain forward)

  2. The cassette is just heavy and has a lot of inertia. I like older cassettes on aluminum spider, they are very light and robust.

  3. Outrageous-Pass-8926 on

    My DT hubs will do this, it’s not something that I would consider negative.

  4. A clutch derailleur solves this problem–or did for me when I put them on my cyclocross bikes. The chain/freewheel doesn’t have enough inertia to flex the cage.

  5. natural_capital on

    Agree with u/abwaerts . Since the bike looks new, i doubt this is the issue but in the past I’ve found that disassembling, cleaning, (and getting new bearings/bushings/washers in the hub helps this.

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