C/Set Tiagra 4500 52/39 170mm High quality 9-speed cassette.
Hyperglide sprockets have a computer designed tooth configuration with contoured shift ga...
C/Set Ultegra 6700 52/39 172.5 Hyperglide: Fast and Accurate shifting
Alloy sprocket carrier: Lightweight
10-speed
Wider range gearing: 11-23T, 12-2...
C/Set Ultegra 6700 Triple172.5 Hyperglide: Fast and Accurate shifting
Alloy sprocket carrier: Lightweight
10-speed
Wider range gearing: 11-23T, 12-2...