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First Look: Shimano Brings Electronic Di2 Tech Down to Deore XT, Adds Wireless Connectivity and 11-46 Cassette Option - Mountain Bike Feature - Vital MTB
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Amazon.co.jp: Shimano IBTDN110A1 BT-DN110A, Total Length 6.0 inches (152 mm), Built-in (Built-in) Type Battery, Bluetooth Compatible : Sports & Outdoors
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