Shimano 9000 Dura ace cassette 11/25
With its Hyperglide EV sprockets, this Dura-Ace 11-Speed cassette features a close gear ratio for efficient energy transfer and a smoother cadence. The 5 largest sprockets are made from titanium, shedding weight without sacrificing strength. The sprockets are extensively cut away and drilled to further reduce weight without affecting rigidity.
Titanium Sprockets (16t and bigger)
Carbon mid spider carrier
11 speed rider tuned gear combinations - 11/25 11,12,13,14,15,16,17,19,21,23,25