A Cycling & bikes forum. CycleBanter.com

Go Back   Home » CycleBanter.com forum » rec.bicycles » Techniques
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Jumping Chain



 
 
Thread Tools Display Modes
  #1  
Old January 11th 19, 09:34 PM posted to rec.bicycles.tech
[email protected]
external usenet poster
 
Posts: 636
Default Jumping Chain

Andrew, I had a strange occurrence today. I got out on the bike and did 21 miles with an average speed of 13.6 with LOTS of stop lights and 20 minutes or so of that into 10 mph wind and probably averaging around 14.5 during that time.

When I started the chain was jumping as if it had a bent spot on it. I kept stopping and adjusting it because I though I might simply have the derailleur misaligned. (I exchanged wheelsets between bikes)

But it was jumping just like it had a bent link. Now it was a good chain with little mileage on it. The distance between the jumps was about a chain length. I looked at the master link since this was a "gold" chain that came with one of those crooked master links which are supposed to be reusable. But I had replaced it with a normal master link.

As I covered the first 10 miles the jumping got progressively less and less until it disappeared.

Have you got any suggestions of what might have caused that?


Ads
  #2  
Old January 11th 19, 10:04 PM posted to rec.bicycles.tech
AMuzi
external usenet poster
 
Posts: 9,944
Default Jumping Chain

On 1/11/2019 2:34 PM, wrote:
Andrew, I had a strange occurrence today. I got out on the bike and did 21 miles with an average speed of 13.6 with LOTS of stop lights and 20 minutes or so of that into 10 mph wind and probably averaging around 14.5 during that time.

When I started the chain was jumping as if it had a bent spot on it. I kept stopping and adjusting it because I though I might simply have the derailleur misaligned. (I exchanged wheelsets between bikes)

But it was jumping just like it had a bent link. Now it was a good chain with little mileage on it. The distance between the jumps was about a chain length. I looked at the master link since this was a "gold" chain that came with one of those crooked master links which are supposed to be reusable. But I had replaced it with a normal master link.

As I covered the first 10 miles the jumping got progressively less and less until it disappeared.

Have you got any suggestions of what might have caused that?



Symptom of a binding rivet or snaplink.

Backpedal slowly while observing chain or running it through
your fingers until you find the offending link. Lubricate
that link, flex it both in normal plane and slightly side to
side until it moves freely.

If that doesn't free it or if chain is bent (visible while
looking at the run of chain end-on) throw it away. Chain
failure risks rider injury.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971


  #3  
Old January 13th 19, 06:05 PM posted to rec.bicycles.tech
[email protected]
external usenet poster
 
Posts: 636
Default Jumping Chain

On Friday, January 11, 2019 at 1:04:36 PM UTC-8, AMuzi wrote:
On 1/11/2019 2:34 PM, wrote:
Andrew, I had a strange occurrence today. I got out on the bike and did 21 miles with an average speed of 13.6 with LOTS of stop lights and 20 minutes or so of that into 10 mph wind and probably averaging around 14.5 during that time.

When I started the chain was jumping as if it had a bent spot on it. I kept stopping and adjusting it because I though I might simply have the derailleur misaligned. (I exchanged wheelsets between bikes)

But it was jumping just like it had a bent link. Now it was a good chain with little mileage on it. The distance between the jumps was about a chain length. I looked at the master link since this was a "gold" chain that came with one of those crooked master links which are supposed to be reusable. But I had replaced it with a normal master link.

As I covered the first 10 miles the jumping got progressively less and less until it disappeared.

Have you got any suggestions of what might have caused that?



Symptom of a binding rivet or snaplink.

Backpedal slowly while observing chain or running it through
your fingers until you find the offending link. Lubricate
that link, flex it both in normal plane and slightly side to
side until it moves freely.

If that doesn't free it or if chain is bent (visible while
looking at the run of chain end-on) throw it away. Chain
failure risks rider injury.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971


Damn, it never occurred to me that it could have been a frozen link. That's why it finally started working. Thanks.
  #4  
Old Today, 08:47 AM posted to rec.bicycles.tech
JQ
external usenet poster
 
Posts: 26
Default Jumping Chain

On 1/13/2019 12:05 PM, wrote:
On Friday, January 11, 2019 at 1:04:36 PM UTC-8, AMuzi wrote:
On 1/11/2019 2:34 PM,
wrote:
Andrew, I had a strange occurrence today. I got out on the bike and did 21 miles with an average speed of 13.6 with LOTS of stop lights and 20 minutes or so of that into 10 mph wind and probably averaging around 14.5 during that time.

When I started the chain was jumping as if it had a bent spot on it. I kept stopping and adjusting it because I though I might simply have the derailleur misaligned. (I exchanged wheelsets between bikes)

But it was jumping just like it had a bent link. Now it was a good chain with little mileage on it. The distance between the jumps was about a chain length. I looked at the master link since this was a "gold" chain that came with one of those crooked master links which are supposed to be reusable. But I had replaced it with a normal master link.

As I covered the first 10 miles the jumping got progressively less and less until it disappeared.

Have you got any suggestions of what might have caused that?



Symptom of a binding rivet or snaplink.

Backpedal slowly while observing chain or running it through
your fingers until you find the offending link. Lubricate
that link, flex it both in normal plane and slightly side to
side until it moves freely.

If that doesn't free it or if chain is bent (visible while
looking at the run of chain end-on) throw it away. Chain
failure risks rider injury.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971


Damn, it never occurred to me that it could have been a frozen link. That's why it finally started working. Thanks.

It also could be a stretched or binding shift cable and finally started
to move freely from shifting the gears.

--
Coach JQ

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Chain jumping out of big cog when climbing Tim Graichen Techniques 2 October 7th 06 03:24 PM
campagnolo jumping chain M. Bakunin Techniques 6 August 9th 06 02:48 PM
chain tension/jumping czb Mountain Biking 4 July 7th 05 05:50 AM
Jumping chain. Tazlvr UK 11 January 1st 05 05:44 PM
chain jumping; quite frustrating, help? Qui si parla Campagnolo Techniques 1 July 9th 03 03:45 PM


All times are GMT +1. The time now is 08:10 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright 2004-2019 CycleBanter.com.
The comments are property of their posters.