Bird cut (RL) cottered bicycle chain wheel (C), in sizes 44 / 46 / 48. As the drive-side chain wheel and crank, it passes pedalling power to the chain, and its cottered fitting secures the crank to the bottom bracket axle with a cotter pin. The bird cut chainring carries an ornamental open pattern of curved cut-outs, paired with a single crank arm in a bright silver finish.