With a rigid carbon and aluminium spider to efficiently transmit force, this lightweight 11 speed cassette will ensure all your effort is translated into forward momentum. Hyper glide sprockets have been specially designed to minimise weight through improved teeth shaping whilst providing accurate shifting and reduced wear. Whether it is a weekday training cruise before work, or a competitive weekend club race, this cassette will ensure you have the gear combinations you need. . Series: Ultegra
. Gear: 11-speed
. Teeth: 12-25
. Compatible chain: HG-EV 11-speed
. Carbon/aluminium (spider), steel (sprockets), aluminium (lockring)
. Weight: 243g