The benchmark for road bike components was set long ago. It was set by Shimano and their Dura-Ace group of components. A group set that has been raced on and proven many, many times over. Yet, they still find improvements and tweaks to keep inching that benchmark further and further towards perfection. The Dura-Ace 9100 Crankset has been redesigned specifically for modern race bikes that are using disc brakes and shorter chainstays. They provide the necessary chainstay clearance without increasing Q-Factor. Stiffer, stronger, 7 grams lighter and perfect for today's modern race bike.
NOTE: BB not included
Accommodates frames with shorter chainstays (410mm) and 135mm rear spacing
New designed crank arm maintains high rigidity provides optimum power transfer and reduces weight
4-arm construction crankset
Adapted for race specific disc brake system
Redesign the gear teeth profile to fit wider gear pitch
Used it to replace a DA 7700 nine speed crank. I also replaced the octalink BB with the 9100 BB and after six hundred miles or so it is working great, I didn't even have to adjust the front derailleur. It was totally plug and play. The crank itself feels great and I notice less flex when I stand up on the pedals.
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