Sorry, this product is no longer available!
Shimano Ultegra CS-6600 Cassette is no longer available at Merlin Cycles. However you may find an alternative or updated product below.
Shimano Ultegra CS-6600 Cassette
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Shimano Ultegra CS-6600 Cassette

This item was discontinued 6th April 2020.

If you require help finding an alternative to this product please contact customer services.

Code: ICS660010
Shimano Ultegra CS-6600 Cassette

Hyperglide sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load. The three largest sprockets are mounted on a lightweight alloy carrier to reduce weight and increase rigidity. Sprockets are cut away and drilled to further reduce weight without reducing rigidity.


  • Nickel-plated finish offers hard wearing resistance to corrosion
  • Chrome-plated steel cassette lockring
  • For Super Narrow 10-speed HG chains
  • Close ratio gearing allows a more efficient use of energy through finer cadence control
  • Ratio: 15-16-17-18-19-20-21-22-23-25
  • Weight: 235g for 11 - 23T