The fulcrum red metal zero xrp 650b mountain bike wheelset is the top of the line packed with cutting edge technology made for the podium chasers the carbon fibre hub is extremely light and boosts the wheels reactivity the freehub body in titanium drastically reduces the weight of the wheel and increases its performance the spokes are thinned straight head steel spokes laced on the front wheel using fulcrums exclusive 21 lacing meaning there is 16 on the left hand side cross laced and 8 o