Shimano brakes, gears, components and cycling accessories incorporate more than 45 years of cycling vigour built into each design; their experience and expertise make them the popular choice of the professional and amateur cyclist the world over.
Shimano Ultegra 6600 Cassette
The distinctively designed Hyperglide sprockets incorporate specially positioned shift ramps and tooth profiles for improved chain control during shifting. Fast and responsive indexed shifting is the result. The HG cassette sprocket, which was developed for 10-speed system, underwent comprehensive optimization to achieve super-highly efficient shifting.