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

New: Take part in the Newton-Rider International Giveaway for a Foldable Bicycle Helmet


Chain slipping when shifting
#1
My old nishiki bike was having some troubles with the chain, when I pedaled hard it would slip and gear shifting was rough so I inspected it and found a seized link and replaced the chain. When shifting (non indexed shifter) sometimes if I'm not being careful the chain will go between 2 gears and spin freely when shifting to a lower gear. My assumption is that my rear freewheel/cassette needs to be replaced, is this the case or is it possible that I did a poor job adjusting the derailleur?
  Reply
#2
The "going between" could be a sign that you got too narrow a chain. If you have a 6 speed cluster and got a chain made for 9 speed for instance, it would be very narrow.

If you have non-index shifting, most likely you have a freewheel. These tend to last a lot longer than cassettes. But if it still slips when you put a heavy load on the pedals, I'd change that too.

Freewheel or cassette?
http://sheldonbrown.com/free-k7.html

The slipping under heavy pedaling though is often a sign that the chain and cassette are both worn. It's often advised to change both at the same time unless you know one is quite new (especially on cassettes). So it may make sense to replace the cluster regardless.
  Reply
#3
(09-05-2014, 05:17 PM)DaveM Wrote:  The "going between" could be a sign that you got too narrow a chain. If you have a 6 speed cluster and got a chain made for 9 speed for instance, it would be very narrow.

If you have non-index shifting, most likely you have a freewheel. These tend to last a lot longer than cassettes. But if it still slips when you put a heavy load on the pedals, I'd change that too.

Freewheel or cassette?
http://sheldonbrown.com/free-k7.html

The slipping under heavy pedaling though is often a sign that the chain and cassette are both worn. It's often advised to change both at the same time unless you know one is quite new (especially on cassettes). So it may make sense to replace the cluster regardless.

I put a 7/8 speed chain on my 6 speed cassette, the person at mec said it should be fine, is it?
  Reply
#4
(09-05-2014, 05:30 PM)nishikibike Wrote:  I put a 7/8 speed chain on my 6 speed cassette, the person at mec said it should be fine, is it?

I think technically it is yes. You might look at how the chain sits on the gear teeth. If it doesn't drop completely into the valley of every tooth equally and rides up on the side of some teeth, that could be a sign the cluster is very worn and a new one would improve things.

Different freewheels also have different gaps between cogs. Could be you have one with wider gaps and that it would work better with a 5-speed chain.

If you post the exact make (and model if known) of everything you have, someone might have more specific advice. Sorry I can't give you a firmer answer.
  Reply
#5
Going between gears has nothing to do with derailleur adjustment on a friction shift, as the only adjustment is at the two ends (an b-tension). You should check to make sure the cable is running freely, especially if the slipping occurs when going to smaller cogs - the derailleur spring does the shifting, and must be able to easily pull the cable through the housing. If there's binding you may be caught between gears.
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
1,074
12-01-2020, 02:10 AM
Last Post: Jesper
 
6,485
06-17-2013, 05:25 AM
Last Post: capner2112
 
6,672
06-02-2012, 02:15 PM
Last Post: xerxes
 
7,018
04-13-2012, 08:44 AM
Last Post: Jarvan2011

Forum Jump:

[-]
10 Latest Posts
NewBikeShopper (intro & opinion request)
Yesterday 02:58 PM
Do you wave to other cyclists?
Yesterday 02:48 PM
Road bike brakes upgrades
Yesterday 12:39 PM
Newton-Rider, a helmet like no other
01-15-2021 05:01 PM
Colnago R41 Handlebar
01-14-2021 10:24 PM
How much do you bike per year?
01-14-2021 04:50 PM
BMX Shoes
01-14-2021 04:42 PM
Colnago C64 setup advice
01-14-2021 04:26 PM
1983 Trek 720
01-13-2021 10:30 AM
Riding all day on the winter solstice
01-13-2021 07:43 AM

[-]
Top 5 Posters This Month
no avatar 1. Criminal
21 posts
no avatar 2. Zviedrs
6 posts
no avatar 3. Yevhen
5 posts
no avatar 4. Henry_G
5 posts
no avatar 5. RollOn
5 posts