- HG80 Mega9 cassette featuring light weight minimal design sprocket carrier
- The 3 largest sprockets are mounted on a lightweight alloy 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