DT Swiss 350 Classic Flange IS Disc Hubs. Features: Affordable Swiss performance With DT's ratchet system (36t), all of the teeth on each side of the ratchets engage simultaneously every time. This creates much smaller point loads and results in the legendary reliability of Ratchet System hubs 6-bolt disc Steel cartridge bearings Refined end caps allow for easier disassembly HG 8-11sp: Not compatible with HG 11sp road cassettes DT Swiss spoke calculator: https://spokes-calculator.dtswiss.com/en/calculator Specs: F R:rear (XD) Axle Spacing Mm:12x142 Hole:32h Color:black/white Weight:263g