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Old 09-13-09, 07:50 PM   #1
jpl8910
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Rear Derailleur question

What is the difference between long, medium, and short (other than length) cage rear derailleurs?

Thank you
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Old 09-13-09, 08:10 PM   #2
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Sealed bearings on jockey pulleys, weight to strength ratios. Materials used can be like tin cans tin cans or extremely stiff CF.
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Old 09-13-09, 08:12 PM   #3
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Thanks for the response.

What advantages do the different lengths give?
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Old 09-13-09, 08:21 PM   #4
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Taking up chain wrap, Quick tutorial, (if you run a 1x9 setup, a short cage should do anything you need. 2x9 maybe a mid length, and a three x 9 maybe a long cage) JUst a guide line, not a "set in stone" rule.
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Old 09-13-09, 09:20 PM   #5
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^yeah basically, longer derailleur= able to handle greater change in chainlenght, so if you have a 1x9 on an 11-23 cassette there is very little diff in chain lenght between ur easy and hard gears, but if you have a 3x9 on a 11-36 cassette there is a ton of change in chain lenght. The shorter the cage the less likely you are to break the derail
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Old 09-14-09, 08:58 AM   #6
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yeh the longer the better, well better handling anyway.
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Old 09-14-09, 06:53 PM   #7
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yeh the longer the better, well better handling anyway.
i thought the opposite would be true??

i always aim for the shortest cage length per application. i am running a med cage on a 5.5" travel bike with 3-rings up front.

mx
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Old 09-14-09, 07:51 PM   #8
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What advantages do the different lengths give?

There is no advantage to different cage lengths -- you choose the size you need depending on how your bike is geared. If you normally wear a size 10 shoe, there would be no advantage to wearing a size 8 or size 12.

It all depends on the derailleur capacity you require for your setup.

http://www.parktool.com/repair/readhowto.asp?id=26
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