Shimano XTR Front Derailleur FD-M985. You think you know about XTR huh? Think again. The world’s best mountain bike components just got better. This year these Shimano front derailleurs got some upgrades — flexible mounting options, easy access fasteners and limit screws — making your life and your mechanic’s life a heck of a lot easier. Hollow link pins shave grams, and the slimmed down cage gives more clearance for bigger tires. For use with Shimano XTR double cranksets.