Upgrade or replace the drive gear on your single-speed or folding bike with this durable 12T steel freewheel. Precision CNC machined and cold-forged for strength and smooth engagement, it offers a reliable and efficient gear ratio for urban commuting and casual riding. Product Features Durable Steel Construction Made from cold-forged steel and precision CNC machined for excellent durability, smooth tooth engagement, and long-lasting performance under regular cycling loads. Compact 12-Tooth Design A 12-tooth (12T) sprocket provides a gear ratio suitable for urban riding and folding bikes, offering good acceleration and manageable pedaling effort on flat terrain. Standard Threading Compatibility Features standard 34mm ISO threading with an 18mm inner hole, making it compatible with most single-speed and fixed-gear bicycle hubs. Easy Installation A direct replacement for worn or damaged freewheels. Use a freewheel removal tool to install or replace on your compatible bike hub. Technical Specifications Teeth: 12T Material: Steel Thread Standard: 34mm ISO (Inner Diameter) Inner Hole: 18mm Outer Teeth Diameter: 53mm Total Thickness: 26.5mm Package Includes 1 x 12T Single Speed Freewheel Sprocket