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The Shimano M770 Deore XT Rapidfire Dyna- Sys Shifters - 10 Speed with 2-Way release to exceed the demands of ever changing bicycle designs and riding styles. 2-Way release: the upper lever still performs the same shift function but it can now swing in either direction allowing it to be released by the thumb or index finger. Multi-Release allows the upper release lever to perform up to two shifts in one sweep. Multi-bearing design uses two ball bearing units to provide a low-friction and reliable shifting action. One piece lower alloy thumb release lever increases durability and gives sharp precise shifts.
