DT Swiss 350 StraightPull CenterLock Disc Hubs. Features: Affordable Swiss performance in a straight pull hub shell 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 Center Lock 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 r Specs: F R:rear (XD) Axle Spacing Mm:12x148 Boost Hole:28h Color:black/white Weight:215g