Peter Salt
Bittersweet
- Location
- Yorkshire, UK
How's the alignment that I mentioned in post #11?
If that's all good, we may indeed need photos.
Chain falling off front mech
- Thread starter fraz101
- Start date
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If that's all good, we may indeed need photos.
Peter Salt
Bittersweet
- Location
- Yorkshire, UK
Correct. But mechanical/adjustment issues should be investigated first. It's tough doing it remotely though, isn't it?
I suppose we could just tell Fraz to reset the whole thing and adjust from scratch using Shimano user manual... Or take it to a mechanic... But that's no fun
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fraz101
Senior Member
I honestly think it’s this.
I will update with pics just now
I’m certainly not starting from scratch. Lol
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fraz101
Senior Member
Probably because I'm explaining it very poorly.
The procedure:
Put the lever in the 'big ring' position - all the way. And then do the 'half click' down - you know, the click that doesn't make you shift down to the small ring but just moves the FD slightly inwards to make room for a bit of cross-chaining.
When in that position, look at your FD, specifically this part with the two lines I've highlighted with a red and blue arrow:
View attachment 654275
Are these lines... In-line?
No
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fraz101
Senior Member
Think we need pictures of the FD cage: one from the side in the large ring, and one from above the FD with the chain in the small ring and largest sprocket.
Maybe the wax on the chain is causing this increase in chain drop.
Big ring front,mid cog rear
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fraz101
Senior Member
Think we need pictures of the FD cage: one from the side in the large ring, and one from above the FD with the chain in the small ring and largest sprocket.
Maybe the wax on the chain is causing this increase in chain drop.
Small cog front,big cog rear
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Peter Salt
Bittersweet
- Location
- Yorkshire, UK
OK. Adjust the 'tension screw' (clockwise, location below) until they align. If you do it up all the way and they still don't align, you need to release the cable and re-pinch.
It's a bit difficult to tell, but it seems like the FD is not parallel to the chainring. If that's indeed the case, adjust with this screw:
Send through that side-photo as well (when in big ring) - so we can see the distance between chainring and FD edge.
Sittingduck
Legendary Member
- Location
- Somewhere flat
The bold bit was what I thought. Imho it needs about half a degree rotation CW so the plate/cage part of the FD is parallel to the rings.
Will Spin
Über Member
Read the Shimano dealer manual - always works for me! Front mechs are quite tricky to set up.Correct. But mechanical/adjustment issues should be investigated first. It's tough doing it remotely though, isn't it?
I suppose we could just tell Fraz to reset the whole thing and adjust from scratch using Shimano user manual... Or take it to a mechanic... But that's no fun
Peter Salt
Bittersweet
- Location
- Yorkshire, UK
Looks like it's adjusted. Give that a try.
Noticed that the 'tension screw' is (almost?) all the way in. Always a good idea to re-pinch the cable and leave some room for on-road adjustments. But that's just advice - not a necessity.
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fraz101
Senior Member
I tried to do that. Had long nose pliers on the cable to pre tension it but that was as tight as I could get it.
I’ll update once I’ve done some mileage
Thanks for the help everyone
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https://cycling-obsession.com/modern-shimano-front-derailleur-adjustment-guide/
Interesting input from peter salt led me to read about the tension lines on the FD
That link is the long winded explanation
Good awareness Peter...so thanks for that
Interesting input from peter salt led me to read about the tension lines on the FD
That link is the long winded explanation
Good awareness Peter...so thanks for that
