Feature:1. Aluminum Alloy Material: Constructed with premium aluminum alloy, this bike freehub body is sturdy, erosion resistant, and highly durable, ensuring long lasting performance.2. Highly Precise Threaded Machining: The freehub body features high accuracy threaded machining, guaranteeing a tight connection with the bike hub for stable and reliable operation.3. High Performance Design: Designed for high speed cycling, this freehub body offers effortless pedaling and smooth rotational movement with minimal noise, allowing for an enjoyable riding experience.4. Compatibility and Versatility: Equipped with a ratchet system and a two bearing structure, this freehub body supports for Shimano 11 speed cassettes. For cassettes below 10 speed, a 1.85mm spacer is required.5. Perfect Replacement: The original bike cassette freewheel body parts or damaged parts can be replaced directly, with higher strength and convenience.Specification:Item Type: Bike Freehub BodyMaterial: Aluminum alloyWeight: Approx. 53g/1.9ozAperture: 15mm/0.6in, support 12mm barrel shaftConstruction: Ratchet system, two bearingsApplication: Suitable for shimano 11 speed cassette flywheel, 1.85mm gasket is required below 10 speed..Package List:1 x Bike Freehub Body