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Old 11-01-05, 12:30 AM   #1
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"double" derailleur, "tripple" cranckset

Sorry for newbie question but can "double" derailleur be used on "tripple" crankset?
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Old 11-01-05, 02:07 AM   #2
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no- the cage will be too short

(edit - good point retro grouch- I jumped to conclusions and assumed the rear derailleur)
only the dead have seen the end of mass motorized stupidity


(well if he was alive today he would have written it)

Last edited by royalflash; 11-01-05 at 09:31 AM.
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Old 11-01-05, 05:02 AM   #3
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You asking about the front or rear?

A double front derailleur won't lift the chain as well from the granny to the middle ring. If you're using STI shifters, many people have a hard time getting the front derailleur to shift to their satisfaction anyway so I'd definitely recommend using the right front derailleur for a triple.

On the rear I'd use a short cage double derailleur on a personal bike but I'd prefer to install the correct long cage derailleur on a customer bike. Generally, with a triple, you only use the granny gear with the largest two or three cogs in back. Since you're never getting even close to using the little/little combination, you can live without having enough chain slack take up capability to handle it.

I wouldn't like to put a short cage on a customer triple because 1. I don't know for sure how they ride. and 2. I'd like to give the impression that I pay proper attention to the details.
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