Lapierre kick up 12 boys bike lapierre believe kids should benefit from the same technology as their parents but adapted for their different needs and smaller bodies the lapierre kick up bike takes the best of lapierre mtb know how and adapts the ergonomics and parts for little ones features frame kick up 12 supreme 4 alloy fork lapierre 12 bmx800 28 6mm headset h 840sw threadless 118 steel stem steel itc 7705 30 e 40mm r 7 28 6mm seatpost steel l 155mm 27 2mm handlebar