Enhance the performance and longevity of your bicycle hubs with this premium-quality ratchet kit, crafted from high-quality 20CRMOTI alloy steel to deliver exceptional strength and durability. Featuring a one-piece molding design with a hollow inner wall, this kit ensures denser output power and high rotation efficiency for smooth and reliable operation. Engineered for toughness, excellent low-temperature impact resistance, and superior fatigue resistance, these components provide lasting reliability under demanding cycling conditions.Key Features:· Premium Alloy Steel Construction: Made from durable 20CRMOTI alloy steel, offering strong toughness, excellent low-temperature impact resistance, and outstanding fatigue resistance to withstand rigorous use.· One-Piece Molding with Hollow Inner Wall: Innovative design enhances output power density and improves rotation efficiency for optimal hub performance.· Wide Compatibility: Suitable for X1600, X1700, 1501 wheels, and 190, 240S, 340, 350, 440, 540 bicycle hubs, making it a versatile repair solution for many bike models.· Reliable Repair and Replacement Kit: Ideal as a perfect accessory for repairing bicycle hubs or replacing old and damaged ratchets, restoring smooth and efficient hub functionality.· Convenient Storage Box Included: The package comes with a compact storage box that keeps the kit organized and easy to carry, ensuring portability and accessibility during repairs.Specifications:· Material: 20CRMOTI Alloy Steel· Angle: 6°· Center Hardness: ≥ HRC55· Surface Hardness: ≥ HV2000· Limit Torque: ≥ 400NM· Fatigue Resistance: ≥ 100,000 Cycles (250NM)· Ratchet Size: 27.5 x 27.5 x 11 mm (1.1 x 1.1 x 0.4 in)· Package Size: 90 x 60 x 20 mm (3.5 x 2.4 x 0.8 in)· Package Weight: 61 g (2.2 oz)Package Includes:· 2 x Star Ratchets· 1 x Ratchet Cover· 2 x Coil Springs· 1 x Storage BoxThis ratchet kit combines advanced engineering and high-quality materials to ensure your bicycle hubs operate efficiently and reliably. Whether upgrading, repairing, or replacing hub components, this kit delivers excellent performance and durability, making it an essential addition to any cyclist’s toolkit.