Shimano and Sram 11 speed compatible. Shimano HG51 8 Speed MTB Cassette - 11-28/30/32. Shimano HG31 8 Speed - MTB Cassette 11-32. Special heat treated lightened steel sprockets. General Info. Size: 12-29 (12,13,14,15,16,17,19,21,23,26,29).
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