Ultimate Hardware Plastic Body Folding Bike Pedals 9/16" Thread Suitable for Mountain Bikes, Folding Bikes, Fixed Wheel Bikes, Hybrid Bikes and any Commuter Bikes Thread fitting size is 9/16. This is the most common fitting size with only a handful of Kids' bikes with the older 1/2 thread size Smooth strong steel axle with steel bearings Designed to give good grip in all weathers Weight 395g per pair