The seamless shifting of the DURA-ACE R9200 12-speed cassette allows the rider to focus fully on climbs, sprints, and overcoming personal limits without worrying about the next gear change. Cogs with more teeth ensure higher drive efficiency and secure compatibility with SHIMANO 11- and 12-speed freehubs. HYPERGLIDE+ cassettes set new standards for shifting in off-road use thanks to smooth gear changes throughout the gear range. It is time for this technology to also be implemented in road bikes. Even under maximum effort during climbs or sprints to the finish line, riders no longer need to hesitate to perform a gear change. In all gears, the DURA-ACE R9250 drivetrain delivers maximum efficiency thanks to larger teeth and ensures compatibility with existing 11-speed freehubs. Despite their expansion to 12 speeds and without causing an increase in weight, DURA-ACE CS-R9200 cassettes set new benchmarks for road bike shifting systems.