LOOK spindles are only approved after a rotational test of 2 million cycles at 100tr/min with a load of 90kg on the centre of the pedal and an eccentric rotation (creating a shock on each rotation). LOOK axles are only approved after a rotational test of 2 million cycles at 100 rpm with a load of 90 kg on the centre of the pedal and an eccentric rotation (which creates stress on each revolution).