Durable Material: The freewheel is made of durable and sturdy material, high strength and wear resistant, providing a long service life. Improved Performance: The sprocket provides fast riding speed and efficient power transfer, with smooth turning action and quiet operation. Precise Thread Processing: The cog freewheel features precise thread processing technology, ensuring a secure connection with the bicycle hub and smooth performance. Ideal Replacement: This single speed freewheel is designed for bicycle repair and refit, allowing direct replacement of old or damaged parts to maintain proper bike function. Easy to Install: The chain freewheel is simple to install, requiring minimal tools and no complicated procedures. Specification Item Type: Bicycle Freewheel Structure: Two Pawls, Suitable for M35 x 1.25 - 30 Teeth Fitment: For 412 Type Folding Bicycle Single Speed Conversion Package List 1 x Bicycle Freewheel 1 x Sleeve