Campagnolo centaur 11sp rear derailleurthe campagnolo centaur 11 speed rear mech is highly versatile and offers fast and reliable shifting, thanks to campagnolo's redesigned trajectory angle and their ultra shift geometry'. '.strtoupper('t')his design ensures precise operation with reduced friction and maximum shifting rigidity'. '.strtoupper('a')lso, the centaur is only made in one cage size and compatible with cassettes with up to a 32 tooth sprocket, so there's no need to swap the mech when you want to run a different cassette range'. '.strtoupper('t')he centaur rear mech features trickle down technology from campagnolo's top end models, making it a race ready component, but at a more wallet friendly price!features material aluminium version 2x11 speed cage length medium largest sprocket 32t smallest sprocket 11t weight approx'. '.strtoupper('2')30gbuy campagnolo components from chain reaction cycles, the world's largest online bike store.