Rim profile with which it is possible to use both tubeless and standard clincher tyres differentiated rim heights ndash 26mm at front for optimal manoeuvrability 30mm at rear for optimal power transfer oversized hub body in aluminium gives strong lateral stiffness while reducing weight fulcrum 21 spoke ratio on rear wheel double the number of spokes on the drive side for greater wheel stability and improved power transfer in the rear wheel 16 straight pull aero spokes on front wheel 21