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This Shimano XT Traditional Double Front Derailleur FD-M786 is a traditional styled (bottom-swing) front derailleur. It has been designed to optimize its function with two chainrings. To this end, the cage length and shaping is specific to the smaller diameter differential between the big and little rings on a 2x10 DynaSys drivetrain. Whether you run a 26/38t or a 28/42t crank, this is the changer you'll want. The limit screws are angled outward to facilitate adjustment for convoluted rear suspension designs as well.

The Shimano XT Traditional Double Front Derailleur FD-M786 is specifically designed for use with Shimano's XT Double Crankset and directional 10-speed HG-94 chain, and the maximum chainring size is 42 teeth. The big difference between this derailleur and the triple-compatible version is that this one has a shorter cage. Using it with an XT triple crank would result in the chain dragging across the bridge at the bottom of the cage in many of the rear cogs when you ride in the 24t small ring. It can be used with top- or bottom-pull cable routing. It has a Multi-Clamp that works for three seat tube diameters (28.6, 31.8, and 34.9mm).

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Unanswered Question

Will this work with a triple crankset that...

Will this work with a triple crankset that is set up with two rings and a bash guard? (34t, 24t, and bash)