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Replacing a Shimano Octalink BB-ES25 bottom bracket cartridge - YouTube
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Amazon.com : D Dymoece Bicycle Bike Bottom Bracket Removal Tool for Shimano Octalink ISIS Splined FSA LP VP : Sports & Outdoors
Super B TB-6618 2 In 1 Crank Puller Tool for Shimano Octalink ISIS Drive System TB-6616 TB-6617 Square Taper Crank Remover - AliExpress Sports & Entertainment
Amazon.com : BIKE HAND - Bicycle Crank Puller – Crank Removal Tool for Mountain and Road Bikes with Square Taper Bottom Bracket and Splined ISIS Drive, Octalink : Bike Hand Tools : Sports & Outdoors