Arospeed Light-Weight Hardened Aluminium Crank Pulley is made of 6061-T6 billet aluminium with an over-coating hardened layer. This harden effect will protect the pulley and become wear-resisting. Much quicker throttle response, less power wasted trying to turn a heavy crank means more power to the wheel. The engine accelerates faster. Harder pull off the corners. Reshaped counterweights move through the oil mist with less drag. Lighter cranks have less gyro effect.
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