more intensive power output, high rotation efficiency! the is smooth low friction coefficient good wear resistance and service life Integrated Ratchet: Our star ratchet features an integrated design, making installation and adjustment much easier. 60T: With a total of 60 teeth, each tooth measuring 6°, our system significantly reduces idle travel and greatly improves cycling efficiency compared to 18T/36T/54T options. Compatibility: Designed to work seamlessly with X1600/X1700/1501 Wheels and 190/240S/340/350/440/540 Hubs. Product Characteristics: Our system boasts a simple and compact design with excellent mechanical properties, ensuring powerful and efficient performance output. Core hardness: equal HRC55 hardness: equal HV2000 Ultimate torque: equal 400NM Fatigue resistance: equal 100,000 times (250NM) Colour:As Shown Material:steel Package Contents: 2x 60T Bicycle Freehub Star Ratchet Accessories(With 1x ratchet cover + 1x lubricating grease + 2x coil springs) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.