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Shimano has improved the Dura-Ace group by refining the performance and increasing from 10 to 11 speed for the new ST-9000 group. The Shimano Dura-Ace ST-9000 shift levers have a sleeker hood for better ergonomics and better ride comfort. Even the hood material has been giving a dual compound giving them a softer rubber where hands rest most often. Lever stroke was reduced by 47% over the older 7900 group for lightning quick shifts that are only surpassed by it’s own Dura-Ace Di2 shifters. Shimano also reduced overall lever effort by 43%.