The fulcrum red metal zero xrp 26 mountain bike wheelset has a host of new features and cutting edge technology the carbon fibre hub is extremely light and boosts the wheels reactivity the freehub body is titanium which drastically reduces the weight of the wheel and increases its performance the front wheel has 21 spokes 14 straight head aluminium aero spokes cross laced on the left hand side and 7 radially laced straight head aluminium aero spokes on the right side the rear wheel uses