Chain falling off small ring
Hi all
I'm having a problem which I assume is associated with my gear cable to my front mech stretching - the chain can fall off the small ring, and only just makes it onto the big ring, but with terrible trim.
should I:
a) retension the cable
b) adjust the inner and outer limits on the front mech
c) retension the cable and adjust the inner limit of the front mech (because as I understand it, regardless of tension, the limit should stop the mech dropping the chain)
d) something else.
Thanks a lot
EDIT: title change
I'm having a problem which I assume is associated with my gear cable to my front mech stretching - the chain can fall off the small ring, and only just makes it onto the big ring, but with terrible trim.
should I:
a) retension the cable
b) adjust the inner and outer limits on the front mech
c) retension the cable and adjust the inner limit of the front mech (because as I understand it, regardless of tension, the limit should stop the mech dropping the chain)
d) something else.
Thanks a lot
EDIT: title change
0
Comments
-
Chaps, I have the same problem as obizzle and dropped the chain twice today on hills (grrr). Can I ask a dumb question, what is the limit stop?
I had a look on Sheldon but his picture of limit stops shows them located on the derailer.
On my bike I have a plastic thing on the seat tube and it looks to be a bit too far away to stop the chain falling off. Is this the limit stop or is the limit stop part of the gear mech (and the plastic thing just a "belt and braces" gizmo)?
Many thanks in advance (obizzle, hope you don't mind me piggy backing).0 -
Happened to me twice but not since I fitted a Dog Fang.vintage newbie, spinning away0
-
Bobbinogs; the plastic thing is indeed the belt / braces / bicycle clips gizmo. It's a Deda dog fang as mentioned in the next post by gbs. It should be positioned so it's virtually touching the chain when in the smallest ring / biggest rear sprocket.
The limit stops are the little screws located on front and rear derailleurs.0 -
With some set ups a Dog Fang (or equivalent) is a necessity if one wants to be able to shift to the small ring without dropping the chain. Also handy for preventing scratches on those expen$ive carbon chainstays which might then later snap!0
-
Thanks keef66. I checked the dog fang and it was indeed set too far away. I have moved it forward as you suggest (it was the nice and easy solution) and couldn't get the chain to drop when testing.0