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 Body Material: Aluminum alloy Weight: Approx. 53g/1.9oz Aperture: 15mm/0.6in, support 12mm barrel shaft Construction: Ratchet system, two bearings Application: Suitable for shimano 11 speed cassette flywheel, 1.85mm gasket is required below 10 speed.. Package List: 1 x Bike Freehub Body