Skipping jockey wheels.

[Alan Frame]

No issues whatsoever with changing gear, but the chain seems to be misaligned with the jockey wheels resulting in a constant skipping sound when going forward and a clicky, jumpy [technical term] sound when pushing the bike backwards.

Am I right in guessing that I may somehow have bent the gear hanger or derailleur, or could there be another explanation? I'm supposing it's not an indexing problem as everything changes up and down as it should.

Cheers

 

[02GF74]

which jockey wheels? have you checked the jockey wheels are truning? the after market jw using a sealed bearing are notrious for seizing.

where is the misalignement? place a rule or other straight edge alongside the caage and it will be obious if the cage is bent

 

[Alan Frame]

which jockey wheels? have you checked the jockey wheels are truning? the after market jw using a sealed bearing are notrious for seizing.

where is the misalignement? place a rule or other straight edge alongside the caage and it will be obious if the cage is bent

Thanks for the reply. The jockeys are the ones that came with my Kona Sutra from new and have probably covered about 1K miles. They both turn freely enough but the chain seems to be not running centrally in the derailleur cage, so doesn't mesh smoothly with the jockey wheels.

 

[Maz]

I just wonder if it's the freehub. Easy enough to check this...does the top chain run go slack when you turn the pedal backwards?

 

[Alan Frame]

I just wonder if it's the freehub. Easy enough to check this...does the top chain run go slack when you turn the pedal backwards?

Thanks for your suggestion, I'll have a look in the morning.

 

[RecordAceFromNew]

No issues whatsoever with changing gear, but the chain seems to be misaligned with the jockey wheels resulting in a constant skipping sound when going forward and a clicky, jumpy [technical term] sound when pushing the bike backwards.

Am I right in guessing that I may somehow have bent the gear hanger or derailleur, or could there be another explanation? I'm supposing it's not an indexing problem as everything changes up and down as it should.

Cheers

Bent hanger (more likely) and/or rear mech (less likely) are the likely cause for this.

You can visually check rear hanger alignment easily by removing the mech and replace it with a modern qr rear hub hollow axle (they usually have the same M10 fine thread as the mech bolt). Essential health warning is that the integrity of alloy hangers will be compromised by bending, so replacement of bent hanger is recommended.

 

[Alan Frame]

Bent hanger (more likely) and/or rear mech (less likely) are the likely cause for this.

You can visually check rear hanger alignment easily by removing the mech and replace it with a modern qr rear hub hollow axle (they usually have the same M10 fine thread as the mech bolt). Essential health warning is that the integrity of alloy hangers will be compromised by bending, so replacement of bent hanger is recommended.

Thanks for the reply.

The bike is a steel framed Kona Sutra so the hanger is integral. It is quite stubby and looks fine and it would probably take a real effort to bend it. The derailleur on the other hand is a long cage one for touring gears, so that may possibly have taken a knock without me realising it. I think I'll have to get the bike up on a stand and check the derailleur by sight and also investigate the freehub.

If all that fails, I'll have a go at re-indexing....and probably knacker the bike good and proper in the process, knowing me.

 

[Alan Frame]

Quick update, can't see anything out of true and the freehub is running silky smooth.

Strangely, the clatter appears to have diminished now that I have given the back wheel a good clean, not that it was very mucky in the first place. Shall now have to pluck up the courage to have a go at re-indexing the gears.

 

[Alan Frame]

Doh, doh and treble doh !

Just found out what was going here.

I put a new chain on a couple of months ago and for some reason did not connect this event with the onset of the problem....

Turns out I had mis-routed the chain to run on the outside of a lug on the derailleur cage midway between the jockey wheels, instead of on the inside. The chain ran on the lug resulting in a clicky sound. Now I know what the problem was it is obvious, but I somehow failed to spot it when I had my ear jammed up against it with the pedals turning on the stand !

Posted so you can have a laugh at my expense, and maybe to help someone else avoid the problem in future.

 

[Shut Up Legs]

What a coincidence . I did exactly the same when taking my rear cassette, freehub, etc. off to service them weekend before last. I took the chain off also, then had to undo the quick-link and re-thread the chain after realising I'd routed it incorrectly. The giveaway was a loud rattling noise when I was spinning the pedals backwards after having just oiled the chain.

 

[subaqua]

Doh, doh and treble doh !

Just found out what was going here.

I put a new chain on a couple of months ago and for some reason did not connect this event with the onset of the problem....

Turns out I had mis-routed the chain to run on the outside of a lug on the derailleur cage midway between the jockey wheels, instead of on the inside. The chain ran on the lug resulting in a clicky sound. Now I know what the problem was it is obvious, but I somehow failed to spot it when I had my ear jammed up against it with the pedals turning on the stand !

Posted so you can have a laugh at my expense, and maybe to help someone else avoid the problem in future.

I have never done that and took the chain off and rerouted it the same way again. oh no , not me

its a fairly common mistake apparently

 

[Cyclist33]

Doh, doh and treble doh !

Just found out what was going here.

I put a new chain on a couple of months ago and for some reason did not connect this event with the onset of the problem....

Turns out I had mis-routed the chain to run on the outside of a lug on the derailleur cage midway between the jockey wheels, instead of on the inside. The chain ran on the lug resulting in a clicky sound. Now I know what the problem was it is obvious, but I somehow failed to spot it when I had my ear jammed up against it with the pedals turning on the stand !

Posted so you can have a laugh at my expense, and maybe to help someone else avoid the problem in future.

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Well done for solving the problem!

 

[Alan Frame]

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Well done for solving the problem!

I hope you got bellyache from all that laughing !