The Ultegra 6800 rear hub is a nice value in a durable and reliable hub. The ball bearing design is easily serviced a digital adjustment system borrowed from Dura-Ace makes adjustment easier than ever. The excellent labyrinth seals keep out dirt better than most sealed bearing hubs.
The 6800 rear hub is compatible with all modern Shimano/SRAM cassettes up to 11-speed. The hub includes a spacer that is employed when using a 10,9 or 8 speed cassettes. When using most Shimano 10-speed cassettes you will want to use the very thin spacer included with the cassette as well as the spacer included with the hub.
Includes 64 gram skewer
Easily serviced ball bearing design
Compatible with Shimano and SRAM cassettes up to 11-speed