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Can't shift to granny ring after 9-speed upgrade

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Can't shift to granny ring after 9-speed upgrade

Old 12-27-13, 04:02 PM
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animatorgeek
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Can't shift to granny ring after 9-speed upgrade

I recently upgraded my 8-speed touring bike to 9 speeds and I'm having some trouble. I changed the rear derailleur, cassette, chain and shifters but kept the old front derailleur and chainrings. I got the crankset just 3 or 4 years ago but I think the front derailer might be the original 8-speed road derailleur that came with the bike in 1999 (even though I swapped in a compact crankset from the start). I wasn't sure if the upgrade would require new 9-speed specific versions of either.

I followed the instructions that came with the new shifters for adjusting the front derailleur but no matter how I tweak it, either it won't shift to the granny chainring or, when it does, it skips right past it and derails.

My best guess at this point is that I probably need a new derailleur but I didn't want to make any purchase decisions before getting a more knowledgable opinion. Can anyone give me advice on this?
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Old 12-27-13, 04:12 PM
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OP; And you won't likely get a knowledgable opinion unless you provide specific information on the parts you originally had and the ones you have now... Brand, model, etc. A pix or two could also help.

/L
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Old 12-27-13, 04:13 PM
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It's doubtful that the change to a 9 speed chain would cause a problem. Follow the instructions for front derailleur from the beginning at https://www.parktool.com/blog/repair-...ur-adjustments. If it still does not work have a shop mechanic look at it or order new derailleur.
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Old 12-27-13, 04:14 PM
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Try hard manually setting the bike on the granny and de tenstion the cables/shifters then adjusting so it works then adjust from there.
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Old 12-27-13, 04:16 PM
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Assuming was OK all along, it might be related to the narrower chain, or the slightly narrower spacing (if it is) of the new shifter.

Start with the basics. , Shift to a mid to large sprocket in back, lthen eave the levers alone and work the FD by pulling the bare wire away from the down tube. You should be able to get decent action this way, and this is also how I prefer to set both the inner and outer limits. If you cannot get decent action manually, then it might be the narrower chain. If you can get it to work, set the inner limit so it works best, then it's a matter of adjusting cable length (tension) so the shifter gives the correct trim and decent action.

An inline adjuster makes the fine tuning much easier and IMO is a must for index front derailleirs.
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Old 12-27-13, 04:24 PM
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My general advice on front derailleurs is to disconnect the shift cable and start from "go" as if you were installing the derailleur for the first time. The position of the derailleur on the seat tube is crucial. My guess is you need a "skosh" of inward angle on the nose of your derailleur cage. One "skosh" = the tiniest amount that you can manage.
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Old 12-29-13, 03:08 AM
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I ended up taking it to the shop and they were able to fix everything by adjusting the cable tension. Looks like I have a few things to learn about front derailleur adjustment.
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