The huge, 13 tooth, pulley wheels do seem to give a large total capacity from a relatively short cage - recalling the ghost of SunTour’s three pulley wheel system. The Dura-Ace 7700 GS has all the qualities of the SS version such as sealed bearing pulley wheels, cold forged parts, some kind of fancy fluorine coating on the pivot pins and more ‘O’ rings than you can shake a stick at. RD-7700-SS RD-7700-GS DURA-ACE Rear Derailleur (9-Speed) Short Cage Long Cage. It was a triumph of beer-fueled reality over EPO-fueled fiction. An overview of the significant changes made to the Shimano Dura Ace 9000 mechanical. Considering taking out a chain link or two. The spring tension adjustment screw is all the way in.
The introduction of the Dura-Ace 7700 GS indicated that the portly wallets of portly gentlemen counted for more than the alluring image of speed, youth and fitness that Shimano had carefully cultured for Dura-Ace over two and a half decades. Anyone running (or seen run) a Dura-Ace rear derailleur with a 12-27 cassette The Shimano site lists 27 as the max cog size for the RD-7800-SS but on mine the 27 tooth cog is in contact with the upper derailleur roller.
Finally Shimano gave in to the inevitability of having to sell its top-of-the-line groupset to fat middle-aged men who want low, low gears. Id like to change the gearing on my road bike, which has a full Dura Ace 7700 groupo circa 2001 (tiny hubs and all).
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