All new for BMX racing, the INSIGHT PL4 crank set, a lightweight 2 piece Crank set, featuring a 4 Bolt Spider Arm with a 24mm Cromo Spindle Axle thats press fit into the crank arm. The Non drive side features a dual pinch bolt design to keep the cranks tight and running smooth, all the way to the podium! Crank Features Forged 6061-T6 Aluminum crank arms 24mm Cromo spindle axle that is press fit into Drive side, Non Drive side has dual pinch bolts 104mm 4 Bolt Chain Ring Pattern 3 Size options - 170, 175 and 180mm Bottom Bracket not included - For use with a 24mm Bottom Bracket including Press Fit or Euro Style threaded BB's Q Factor 160mm 2 Color Options Black w/ black laser etched graphics Black w/ silver laser etched graphics Crank Weights 170mm: - 774 Grams - 27.3 ounces 175mm: - 785 Grams - 27.6 ounces 180mm: - 793 Grams - 27.9 ounces