Features ---Hard enough: chrome-molybdenum steel shaft core, aluminum alloy frame, integrated aluminum alloy anti-skid nails, strong strength; ---Anti-slip: double-sided anti-skid nails, anti-slip tread surface, pedaling feeling is real, to provide a guarantee for your safety; ---Durable: overall metal material, strong and durable, not easy to break; ---Lubrication: 3 bearing design, high lubrication, and labor-saving rotation; Specifications -R27 -Weight: About 260g(1 pair) -Size: 10.5 * 9.1 * 1.8cm -Material: aluminum alloy frame -Bearing: DU bearing -*R27DU: uses DU bearing, strong durability and tough, suitable for daily leisure -Disadvantage: DU bearing, The new pedal will be very tight and difficult to rotate, and the lubricity will increase after running-in; if you mind, please do not buy -R67 -Weight: About 272g (1 pair) -Size: 10* 9.1 * 1.8cm -Material: aluminum alloy frame-Bearing: 3 Palin bearings -*R67: uses 3 bearings, improves the lubrication; change the shaft core into chrome molybdenum steel shaft core, has strong strength and -light weight -R67Q(Quick Release) -Weight: About 352g (1 pair) -Size: 11.5 * 9.1 * 1.8cm -Material: aluminum alloy frame -Bearing: 3 Palin bearings -*R67Q: refits threaded part of the shaft core into a dismounting interface; can dismount the pedal quickly without tools, saves time and -space