2 mm x 2100 mm

safety and ventilation do not need to come at the expense of each other

KOKO means “to soar

Rally power meters have undergone rigorous testing to ensure total reliability

SHIMANO Dura-Ace CS-R9200 12-Speed Cassette Derailleur 2 mm x 2100 mmThe uninterrupted shifting experience of the DURA ACE R9200 12 speed cassette range lets you climb, sprint, and push your limits without stopping to think about your next gear change. Larger driving cogs maximize drivetrain efficiency and create compatibility with both SHIMANO 11 and 12 speed freehub bodies. HYPERGLIDE+ cassettes have revolutionized off road shifting with their seamless shifts both up and down the gear range. Now it's time for the