Light and strong BMX 3-pcs cranks. Crankarms made of fully heat-treated 4130 Cr-Mo steel. 19mm hollow axle with 16 splines. The possible weak point of each BMX crank is the place where pedals are assembled. To make it stronger Dartmoor decided to add small gusset from inner side of the crankarm. Sprocket assembling holes for right hand drive (RHD) and left hand drive (LHD). For 2011 they changed the crank bolts material to cr-mo steel (alu bolts available as an option product). Second sprocket hole for assembling sprockets smaller than 23T. Two sprocket bolts (bigger one is hollow).