more intensive power output, high rotation efficiency!the is smoothlow friction coefficientgood wear resistance and service lifeIntegrated 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 .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 HV2000Ultimate torque: equal 400NMFatigue resistance: equal 100,000 times (250NM)Colour:As ShownMaterial:steelPackage 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 +/ 13cm.