Silent Running The solid 7-speed cassette offers Hyperglide technology and is available with a 12-28 and 12-32 sprocket ratio. HG cassettes are also compatible with Shimano IG chains and they care for silent and fluently gear shifting.
Hyperglide Technology The inner outer plate of the HG chain is designed for efficient contact with gear teeth and allows smooth shifting under a high load. The chain achieves higher pedalling efficiency and is perfectly matched to HG sprockets to ensure
