-R67Q refits threaded part of the shaft core into a dismounting interface; can dismount the pedal quickly without tools, saves time and space -Made of metal, not easy to break -Hard enough, chrome molybdenum steel shaft core, aluminum alloy frame, integrated aluminum alloy anti-skid nail, with excellent strength -Anti sliding, double-sided anti-skid nail, anti sliding tread, real sense of treading, to ensure your safety -Bearingdesign, high degree of lubrication, easy to rotate