Designed for the toughest classic races the mavic cosmic pro carbon sl tubular wheelset features an incredibly light and strong carbon design the cosmic pro wheelset features an instant drive 360 freewheel to ensure low friction and fast engagementfeatures mavic cosmic pro carbon sl tubular wheelset whole wheelset weighs in at just 1435g incredibly light carbon tubular rims 16 spokes on the front wheel and 20 on the rear for enhanced lateral stiffness and increased power transfer 40mm rim pr