Chromoly spindle for more reliabilitydiscover the fun and the benefits of riding with the ko classic 3 clipless pedalsimple to use it is possible to adjustment the cleat entryrelease tension to low for an easy clip out its large and wide contact surface provides excellent pedaling stabilitythe ko 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