R4 Specs
Front
Axle Diameter // 15mm
Spacing // Boost 110mm
End Caps // Regular or RockShox Torque (please request in order notes)
Tubeless // Tubeless Ready, Taped, Valves Included
Spokes // 32
![](https://cdn.shopify.com/s/files/1/0052/2783/9586/files/front-hub-flange-specs_c808be71-0723-4c54-bd0a-c6eb298ae782.jpg?v=1591215108)
Rear
Axle Diameter // 12mm
Spacing // Boost 148mm
Driver // XD, HG or Microspline (please request in order notes)
Tubeless // Tubeless Ready, Taped, Valves Included
Engagement // 4-pawl, 36 Point
Spokes // 32
![](https://cdn.shopify.com/s/files/1/0052/2783/9586/files/rear-hub-flange-specs.jpg?v=1591214678)