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derailleur cage size?

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derailleur cage size?

Old 10-11-10, 05:40 PM
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derailleur cage size?

I'm running a 53/39 set of chainrings and a Ultegra 11-23 casette on my TT build. I can get a heck of a deal on a new DA 7800 rear derailleur at my LBS, but it is a GS cage and I know that my set up is probably best with an SS cage. Can I go with the GS or will this just not work?
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Old 10-11-10, 05:42 PM
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cage size refers the chain wrap capacity. it will work
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Old 10-11-10, 05:43 PM
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It'll work. Will it shift as crisply as a shorter cage model? Some say yes, some say no, most say if it doesn't it's not enough to matter, probably not perceptible.

Last edited by well biked; 10-11-10 at 05:48 PM.
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Old 10-11-10, 06:00 PM
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It will shift the same. The only disadvantage is the GS might be a gram or two heavier. If you are not a weight wiener it shouldn't be a problem, Roger
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Old 10-11-10, 07:27 PM
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I swapped to a GS from an SS a few weeks ago. Acutually found that the GS is shifting cleaner.... But I also added a few links that were badly needed.
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