Rear Derailleur Cage Versions

SQU@RETIP
SQU@RETIP Posts: 83
edited August 2008 in Workshop
Hi
Can someone briefly explain to me the difference between medium and short cage versions GS and SS on a Dura Ace 7800 rear derailleur apart from the obvious lengths.Does it have something to do with your chain length and gear ratio.

cheers

S
07 Focus Cayo

Comments

  • campagsarge
    campagsarge Posts: 434
    I think it is to do with gear capacity, allowing you to run a compact chainset with a widely spaced block at the back.
  • redddraggon
    redddraggon Posts: 10,862
    SS - short cage
    GS - Medium cage

    If you have a look on the Shimano it'll tell you somewhere the different capacities - I can't can't remember the Shimano capacities off the top of my head - but medium cage will have a larger capacity (ie can handle enough chain for larger range cassette + larger difference in chainrings)
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  • SQU@RETIP
    SQU@RETIP Posts: 83
    thanks chaps. :D
    07 Focus Cayo
  • aracer
    aracer Posts: 1,649
    If you're using a road ratio cassette, you only really need the medium cage if you've got a triple chainset.

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