Keo Classic3– Chromoly spindle for more reliability.
The Keo Classic 3 spindle is made up of an oversized steel axle with miniature ball bearings (12 mm inside x 18 mm outside) and a needle bearing cartridge for improved wear resistance. A spacer is used to hold the needle bearing cartridge in place.
LOOK spindles are only approved after a rotational test of 2 million cycles at 100tr/min with a load of 90kg on the center of the pedal and an eccentric rotation (creating a shock on each rotation). This test is far more grueling to the current industry standard, the EN14781.