How to convert from Square Taper to Hollowtech II bottom bracket and crankset. The 2021 Specialized Rockhopper budget upgrade series continues with modernizing the bottom bracket and crankset from the slightly outdated square taper system to the more contemporary Hollowtech II external bearing system. Affiliate links (helps me out) Crank Puller (Bike Hand): https://amzn.to/3bum9SH Crank Puller (Park Tool): https://amzn.to/2SXeLch Square Taper BB Tool (Bike Hand): https://amzn.to/2QkQ6NE Crank Cap Tool: https://amzn.to/3tSOict How many bottom bracket spacers should you use? https://off.road.cc/how-many-spacers-install-bottom-bracket-68-73-shimano-hollowtech-sram-gxp Support Nerdy Bike Content! https://www.thebikesauce.com/ The Whole Upgrade Series: Specialized Rockhopper Budget Upgrade Series: https://youtu.be/pByHBGmbCwg Tubeless Conversion: https://youtu.be/ip2_HG8v4V8 Box Components 1x Drivetrain Conversion: https://youtu.be/9LLHjeGOJhs Brand X Ascend Dropper Seatpost Install: https://youtu.be/vddKWmyJrfE Front Fork Upgrade: https://youtu.be/YLR1bLu6cic The Whole Playlist: https://youtube.com/playlist?list=PLjdnN8cjd0vB1NtkhemEp9Qnxtf0k3hOz

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