Theory Cassette hub cogs. Shimano spec. 2.3mm. Fits many cassette hubs.
THEORY TURNSTYLE CASSETTE HUB 16T BLACK, THEORY REAR HUB CASSETTE DRIVER BEARING 6802 15x24x5, THEORY 13T COG 2.3MM SHIMANO SPEC, THEORY 14T COG 2.3MM SHIMANO SPEC, THEORY 15T COG 2.3MM SHIMANO SPEC, THEORY 16T COG 2.3MM SHIMANO SPEC, THEORY 17T COG 2.3MM SHIMANO SPEC, THEORY 18T COG 2.3MM SHIMANO SPEC