Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take Part in the May Giveaway for a Change to Win the Thruster 27.5 Retrograde BMX Cruiser Bike


Chain comes off the rear small sprocket on back peddling?
#1
The chain comes off my rear small sprocket on back peddling. The bike rides good other wise.
I have noticed other riders on the side of the road with the same problem. Without a wheel wrench it is quite hard to free up and put back onto the gear cluster. What causes this malfunction?
"Where ever we go, there we are"
  Reply
#2
(04-05-2015, 08:34 PM)elmore leonard Wrote:  The chain comes off my rear small sprocket on back peddling. The bike rides good other wise.
I have noticed other riders on the side of the road with the same problem. Without a wheel wrench it is quite hard to free up and put back onto the gear cluster. What causes this malfunction?

most common culprit is rear derailleur out of alignment
There are two kinds of people in the world, "Those who help themselves to people, and those who help people!"
  Reply
#3
followed by RD H limit not adjusted correctly.
Nigel
  Reply
#4
(04-05-2015, 08:50 PM)painkiller Wrote:  
(04-05-2015, 08:34 PM)elmore leonard Wrote:  The chain comes off my rear small sprocket on back peddling. The bike rides good other wise.
I have noticed other riders on the side of the road with the same problem. Without a wheel wrench it is quite hard to free up and put back onto the gear cluster. What causes this malfunction?

most common culprit is rear derailleur out of alignment

Thanks for the replies. The chain is bunching up just before the rear gear cluster when back peddling. The bike is very nice and I have ridden it for a couple of years. I'll post a pic. The derailleurs are old Suntour and they may have be mismatched previously. I think I will change both of them out to something newer.
[Image: IMG_00002331_zpstbfawhk9.jpg~original]
[Image: IMG_00002332_zpsakcsxmcr.jpg~original]
[Image: IMG_00002333_zpsojtm7ky6.jpg~original]
"Where ever we go, there we are"
  Reply
#5
I'll take the Suntour derailleurs.  Those are better than the new stuff.  May need a bit of refurb though.

The upper and middle pictures show some issues with chain length AND/OR a tired spring in the RD.
Nigel
  Reply
#6
(04-06-2015, 02:41 PM)nfmisso Wrote:  I'll take the Suntour derailleurs.  Those are better than the new stuff.  May need a bit of refurb though.

The upper and middle pictures show some issues with chain length AND/OR a tired spring in the RD.
when I'm in the smallest rear sprocket the derailleur hits the frame of the lower drop out arm.
Which spring is the RD? Can you buy replacement springs at a good bike shop?
"Where ever we go, there we are"
  Reply
#7
It is the spring inside the rear derailleur (RD).  Bike shops rarely stock parts for old RDs, unless it is a very specialized vintage store.  After taking the RD apart, the problem spring can be identified and a suitable replacement found (industrial supply sources - not bikes) or fabricated (not that difficult if you have the tools and patience).
Nigel
  Reply
#8
(04-06-2015, 03:52 PM)nfmisso Wrote:  It is the spring inside the rear derailleur (RD).  Bike shops rarely stock parts for old RDs, unless it is a very specialized vintage store.  After taking the RD apart, the problem spring can be identified and a suitable replacement found (industrial supply sources - not bikes) or fabricated (not that difficult if you have the tools and patience).
thanks Nigel.
"Where ever we go, there we are"
  Reply


Possibly Related Threads...

Forum Jump:

[-]
10 Latest Posts
ISO Susan B bike by Terry
Today 10:46 PM
9 speed chain on 8 speed bike
Today 10:24 PM
Shimano Deore shifter
Today 02:09 AM
Expensive bikes with crappy wheels
Yesterday 11:12 AM
Specialized bicycle post issue
Yesterday 06:21 AM
What did your first bicycle mean to you?
05-23-2024 11:38 AM
Doctors are Prescribing Cycling
05-23-2024 11:34 AM
Getting back into riding, bike instead o...
05-22-2024 12:55 AM
What was your first bicycle?
05-21-2024 07:27 PM
Philodo H8
05-20-2024 12:50 PM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. Jesper
34 posts
no avatar 2. Nutribun
22 posts
no avatar 3. enkei
20 posts
no avatar 4. Burrobabe
14 posts
no avatar 5. GirishH
13 posts