1Set Bicycle Sprocket Fixed Gear Speed Cog Lock Ring 13T 14T Bike Flywheel Gear
Size: 13T,14T. Type: Cog + Lock Ring. Size: Flywheel: 1.37″ (about 34.8mm) orthodontic teeth, fixed ring: 1.29″ (about 32.8mm) reverse teeth. 1 x Lock Ring. Made of high quality material, very durable.