Why does my chain keep coming off

Twister

Twister

Retrobike Rider
Feedback
View
I'm running my Torus as 1X8 using a Middleburn UNO and the chain keeps coming off the front ring. Any ideas why. It wasn't doing it last week.

Thanks,
Matt
 
Could be the crank has become very slightly loose, or the bottom bracket.

If it was OK before, then something must have changed.
 
Cranks and BB both seem solid.

Chain stays on when rotating the cranks forward or when rotating the wheel backwards, but if I spin the cranks backwards the chain jams between the cassette and the top jockey wheel and then when I spin the crank forwards again it drops the chain on the inside.
 
I'd check to see if any stiff links, bit of something stuck in links maybe ? give chain a good clean ?
 
No components have been changed?
Bent tooth, front or rear?
twisted chain, broken link?
Bent mech/ hanger?
Double check the crank/BB tightness, with the appropriate tools.
 
Thanks for the input everyone. Turned out the lower jockey wheel was sticking. Probably the last bit of authentic Cotswolds mud from the HONC. :shock:

And I've cleaned it twice since last Sunday. :oops:

Now as smooth as a baby's bum. :D
 
You must log in or register to reply here.

Similar threads

Private_Repress
Wanted Middleburn uno 34t
Replies
0
Views
288
Private_Repress
Private_Repress
eric_james
Shimano HG54 chain, won't cut right
Replies
1
Views
325
hamster
H
Fatal Swan
Sorted A few links from a new/ish Shimano 11 Speed chain - sorted
Replies
2
Views
497
Fatal Swan
Fatal Swan
4
Stem rotates but won't come out. Why?
2 3
Replies
24
Views
2K
Nabeaquam
Nabeaquam
Roasted
2004 Kona Coiler for my son
Replies
7
Views
889
Roasted
Roasted

Latest posts

Back
Top