Although we allow you to spec any chainring size at the time of bike purchase - Some of you might have overestimated your power or simply moved to a new location with more or less mountains. These will bolt up directly to your X01 or X1 crankset - You don't need to remove the crankset
- 94BCD
- X-Sync Profile
- Clutch rear derailleur recommended
- 30t-38t
