Classic flanged DJ hubs feature a 6-bolt disc rear and non-disc front . With DT's Ratchet LN 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 . Rear hub includes 12t sprocket . DT Swiss spoke calculator: https://spokes-calculator.dtswiss.com/en/calculator370 series DT hubs specifically design for Dirt Jump builds. Bolt on, 6B rear hub with 12T Ratchet LN cassette sprocket, and brakeless 20mm front hub built on the 370 Classic series shell. Aluminum alloy shell with fully sealed bearings. Item Specifications: Material, Aly, Use, RR, Spacing / Axle, 12TA, Bearing Model, 135, Gears, 1s Cass, OLD, 135, Number of Holes, 32, Front or Rear?, Rear.
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