The Sinz Expert Square Taper BMX Cranks are forged from 6000-series aluminium. The double-sided spider fits standard five-bolt, 110 BCD pattern chainrings. Laser-etched logos and an anodized black finish add style to any bike. A full range of lengths from 135mm to 180mm are available. For use with 110mm square taper bottom brackets (not included). Right-hand drive.