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triple cranksets and deraileurs(2 posts)

triple cranksets and deraileursgf99
Oct 9, 2003 5:52 AM
Browsing around the Shimano website, I noticed they have triple-specific front and rear deraileurs. It makes sense to me that the front would be different for a triple than for a double, but why the rear?
re: triple cranksets and deraileursChen2
Oct 9, 2003 6:19 AM
Shimano calls it capacity, most people call it chain wrap. The rear derailleur needs a longer cage to take up more chain slack caused be the extreme differences in the size of the chain rings and the difference in the size of the cassette cogs.
~Al