Bicycle Drivetrain Component 1973-2026 (差別化: 雑学Hobby軸)。Shimano 島野庄三郎 1921 大阪堺・自転車部品 (Dura-Ace 1973 World Tour級・Ultegra+105+Tiagra+Sora+Claris・Road Hierarchy)+Deore XT/XTR/SLX/Deore MTB+GRX Gravel・Campagnolo Tullio Campagnolo 1933 イタリア (Quick Release 1930発明・Super Record/Record/Chorus・Italian工房Heritage)・SRAM Chicago 1987 (RED/Force/Rival/Apex/AXS無線・XX1 Eagle MTB)・Speed進化: 6→7→8→9→10→11→12 Speed (Cassette段数)・Electronic Shifting (Shimano Di2 2009 Dura-Ace 7970+ULTEGRA Di2+105 Di2+GRX Di2・Wireless 2024 12-speed・Campagnolo EPS 2012・SRAM eTap 2015→AXS 2019 完全Wireless+Bluetooth+ANT+)・Disc Brake (Hydraulic Road 2013 Shimano Ultegra Di2+TRP+Hayes・MTB標準2000s)・1x2 Chainring (SRAM Eagle 12-speed 10-50T MTB)+2x12 Road・Power Meter (SRM 1986+Stages+Quarq+Garmin Vector+Favero Assioma+4iiii・Pedal/Spider/Crank Type)・Bottom Bracket BSA/PressFit BB30/PF30/T47・¥30000-¥¥¥¥¥¥¥/Dura-Ace R9270 Di2 ¥600,000+Campagnolo Super Record EPS¥800,000、2026年Wireless 12-speed+Disc+Power Meter+Tubeless標準。