Box Quantum 20-Mil Cassette Hubset

Box Components


Box Quantum 20-Mil Cassette Racing Hubset

Each hubset includes a one-piece, 16-tooth driver supported by three large, roller bearings. Inside the driver are six pawls, each with two teeth that engage a 60-tooth ratchet ring, meaning the hub has just 6 degrees of engagement. The end result is a higher performing hub with fewer dead spots and less drag than others on the market. Quantum front hubs are available only with 20-mil axles, but the rears can be easily converted between 10-, 15 and 20-mil axles. Each set includes a front and rear 20-mil set-up. Additional spacers included. Optional 10- and 15-mil axles are sold separately.


Axle Material 7075-T6 Aluminum
Driver Material Chromoly
Engagement 60-tooth ratchet ring, 6 pawls with dual teeth for 6° of engagement
Finish Anodized black with laser-etched graphics and orange labyrinth seal
Hole Count 36
Hub Material 6061-T6 Aluminum
Weight 162 grams / 5.7 ounces (front), 595 grams / 21 ounces (rear w/o axles)


  • (1) 20mm front axle
  • (1) 20mm rear axle
  • (2) Axle spacers
  • 16 tooth driver

Hub Dimensions
Front Hub:
Flange Diameter: 48mm
2.65mm Spoke Holes
69mm Flange to Flange Width

Rear Hub:
Flange Diameter: 61mm (both)
2.65mm Spoke Holes
55mm Flange to Flange Width
Rt. Flange to Center: 28mm

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