Description
Dyna-Sys is Shimano's next-generation MTB 10-speed drivetrain system and the Shimano HG81 10-speed cassette benefits from this to bring you an ultra-efficient drivetrain. Its sprockets have a spider arm for the three low sprockets and all the sprockets benefit from HyperGlide (HG) technology. Cassette Ratios: 11-13-15-17-19-21-23-26-30-34T 11-13-15-17-19-21-24-28-32-36T
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