Freewheel, Smoothly Ride Labor Saving Improved Efficiency Lightly Turning Running Smoothly with Thread Tightly Fix the Hub, for Single

Smoother and powerful , lubrication, smoothly ride, labor saving, and improved efficiency

thread, tightly fix the hub, machine tool to grind the thread, riding more assured. Exquisite workmanship, fine quenching, special high‑strength steel, brown plated, more . Item Type: Freewheel Material: Steel Process: Fine Quenching, Special High Tensile Steel, Brown Plating Thread Inner Diameter: Approx. 34mm Celsius 1.3in Number of Teeth: 20T Application: For Single Speed,Normal,BMX ,Folding Bike