The lightest cassette in the Shimano component range. Dura-Ace 12-Speed cassette, like the previous editions, is a class above, utilising the best manufacturing techniques and materials.

Made from a lightweight alloy and carbon fibre spider that houses alloy sprockets and titanium sprockets. The largest sprockets are manufactured from titanium to keep the weight low. The sprockets are also extensively cut away and drilled to further reduce weight without reducing rigidity.