10-Speed Cassettes

Shimano and SRAM Road 10-Speed cassettes are interchangeable. Shimano 10sp MTB cassettes (Dyna-Sys) however, are not compatible with any other system (they have wider spacing between the sprockets than other 10-speed systems).

Shimano Cassette Spacer 1mm

Shimano Cassette 10sp Ultegra 6700 11-25

Shimano CS-6700 Ultegra 10sp 11-28

Shimano CS-6700 Ultegra 10sp 12-30