The New Centaur 10 Speed Group: The most affordable race ready group that has ever been available The best combination of value and price the centaur group incorporates many of the advances that he new 11 speed group does with a substantially reduce price. Group Includes: Ultra Torque Crank set Ergo Power Shifters Skeleton D brakes Ultra Chain QS front derailleur Rear Derailleur Ultra Torque bottom bracket cups Ultra Drive Cassette 2294 grams at the lowest spec