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With a unique flippable design
Enhanced control with better modulation and quicker initial braking point
To further its performance
Install and pair via the reliable and familiar standard AXS set-up and pairing procedure
And despite its smaller construction
SHIMANO ULTEGRA R8100 R8101 Cassette 12S bicycle bike freewheel R8170 tooth:11-34T With a unique flippable designThe uninterrupted shifting experience of the ULTEGRA R8100 12 speed cassette range lets you climb, sprint, or cruise 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 revolutionized off road shifting with its seamless shifts both up and down the gear range. Now it's time for the technology to change
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