Shimano CS-R8101 Cassette 11-30 ULTEGRA 12-speed Size:11-30T 8 inches tyre width (most

8 inches tyre width (most bikes apart from FAT bikes)

Tubeless Ready (TR)

Fat tires need fat tubes

Tube rotates while magnet stays in place

no matter the ride

Shimano CS-R8101 Cassette 11-30 ULTEGRA 12-speed Size:11-30T 8 inches tyre width (mostThe 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