ZTTO Cassette Cog - Single Sprocket, 8-12 Speed

ZTTO replacement cassette cog sold as a single piece, so a worn or noisy sprocket can be swapped out without replacing the whole cassette. Made from aluminum and compatible with same-speed HG standard cassettes across 8, 9, 10, 11 and 12 speed drivetrains, in 11T, 12T and 13T sizes. Useful for fixing chain skip or drivetrain noise caused by a single worn tooth profile. Suited to riders maintaining their own cassette rather than buying a full replacement.

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