The profile of the teeth, completely redesigned in line with the Ultra-Drive project, makes it possible to achieve the maximum response speed at the moment of shifting.
The synchronisation obtained by establishing a specific position of the teeth between sprocket and sprocket makes the passage from one sprocket to the next very fluid and fast.
And in order not to lose rigidity, the last two are fitted on an aluminium frame.
steel Ultra·Drive single sprockets nickel-chromed finish supplied with lockring
SPROCKET SYNCHRONIZATION: sprocket tuning is carefully designed to make shifting faster and more accurate and less chain stress ULTRA-DRIVE TEETH DESIGN: optimized upshifting NICKEL-CHROME SURFACE TREATMENT: reduces chain/sprocket friction and extends