koozer xm490 bicycle hub disc 32h front&rear mtb/road 9x100mm 10x135mm qr (black) koozer new koozer 72hd hub front & rear w/ quick release cnc precision technology front:205g, rear:305g, qr skewer: 88g/f+r material: al7075 + cnc 2+4 sealed nbk bearings(f: 2, r: 4 made in taiwan), smooth and quite rolling o.l.d: f-100mm r-135mm axle: f- 9x100mm, r-10x135mm alloy cassette body shimano 8/9/10s 6 pawls, 72 clicks per revolution of the freehub when rear axle rotating: it issued a crisp clatter