12 speed wide ratio. XD Driver body. Gear Combination: 10-12-14-16-18-21-24-28-32-36-42-50. A7075 42T-50T. Alloy spiders, lockring & spacers. 6061 lockring. 10-50T. Weight: 560g.
Best Price: £194.39 from Merlin Cycles
SunRace MZ91X Cassette – 12 Speed – Black / 10-50 / Sram XD Drive Reviews