Yesterday I cleaned my bike and oiled it. Today I rode my bike to work and suddenly I had no tension on my chain anymore. Bike is just a few months old. Recently my rear derailleur was bent but I brought it to a shop and they fixed it. Any ideas?
by yancay
3 Comments
You didn’t change anything with the setup here? No messing with chain or position of the derailleur?
It’s hard to tell from the pics but i’m gonna rule out a broken B-screw, and assume that the RD is sitting nicely on the tab of the dropout. But it might be the clutch. The clutch tension might have gone out the window. It sits in the “big house” on the mech, i don’t have an instruction video but here is one of a guy disassembling it.
https://www.youtube.com/watch?v=aJ3YtUf4ECA
I haven’t done this procedure on this mech so i wouldn’t know exactly how you can wind it up but surely you can do it without too much fuss.
It looks like you wrapped the chain around a branch and popped both springs: one that encircles the mounting bolt screwed into the derailleur hanger, and the second at the top of the cage pivot point. Take the derailleur apart, reinsert the end of each spring into the hole, preload, and then screw it back together. You do this one spring at a time. It’s a challenge to screw each pivot back together while preloading the spring, but you’ll get it if you stick to it.
Or take it to a bike shop. The derailleur itself looks to be in good shape, and it doesn’t appear your derailleur hanger is bent–though I would check that.
Isnt there a lock-button? You must have presses it accidently during wheel intallation…
Like in this vid:
[https://www.youtube.com/watch?v=tUWSJonBVas](https://www.youtube.com/watch?v=tUWSJonBVas)