DT Swiss 240 EXP StraightPull CenterLock Disc. Features: Ratchet EXP (36t) features a fused threaded ring/ratchet and single spring, reducing the number of components for a lighter and more durable freehub system Integration of drive side bearing into threaded ring widens bearing stance, resulting in 15% greater hub stiffness With DT's ratchet system, 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 11sp road: Compatible with HG splined Shimano/SRAM 11sp cassettes. Also compatible with Shimano/SRAM 8-10sp cassettes with spacer DT Swiss spoke calculator: https://spokes-calculator.dtswiss.com/en/calculator Specs: F R:front Axle Spacing Mm:12x100 Hole:24h Color:black/red Weight:104g