For the ultimate ups and downs this is real mountain biking supercharged with awesomely agile handling killer stiffness and ideal weight distribution the moterras not only lets you climb like an electron fueled god they let you rip rail and shred like one toosi motor mountthis proprietary cannondale motor mount positions the bosch drive unit in the best possible position it allows ultra short chainstays and aligns the pivot so that suspension action is unaffected by motor and pedal torqu