HG80 Mega9 cassette featuring light weight minimal design sprocket carrier.
The 3 largest sprockets are mounted on a lightweight aluminium carrier, to reduce weight and increase rigidity.
Hyperglide sprockets have a computer designed tooth configuration, with contoured shift gates, resulting in a crisp smooth shift, even under load.
Close ratio gearing allows a more efficient use of energy through finer cadence control.
Sprockets are cut away and drilled to reduce weight, without reducing rigidity.
For Super Narrow 9-speed HG chains.
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