Only Compatible New Micro SPLINE FreeHub Body FEATURE Pedal continuously while shifting Lighter and stiffer cassette sprocket construction reduces inertia and increases acceleration BENEFIT Advanced shifting performance provides the confidence to enjoy any trail Lighter drivetrain set up Wide range and close step 12-speed drivetrain MICRO SPLINE Combination 10-12-14-16-18-21-24-28-33-39-45-51T .
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