We designed and built our hubs to our exact needs in order to make the best wheelsets possible. This hub features forged alloy components and precision bearings for smooth running and reliability. The hubs are modular so they will accommodate multiple axle types and both 6 bolt and centerlock disc types. The rear hub comes in both standard and boost spacing with the option for either HG or XD drivers. The hub features a large 17mm full axle to resist bending under heavy drops and hits. The bearings ride on the axle and the endcaps press on the bearings for high precision. The freehub features a 6 pawl offset design that provides a high POE for near instant engagement. Finally, we designed the endcaps to be tool free interchangeable. All of this results in a superior wheelset that will give you many miles of worry free riding anywhere you choose to ride.


Reactor straight pull rear hub

  • Strong forged alloy components in body, axles, and endcaps.
  • Precision bearings and seals.
  • Tool free assembly for easy maintenance.
  • Rear hubs designed for 135/142mm or 148mm boost.
  • Freehub bodies for HG and XD compatibility featuring 6 pawls
  • High POE ratchet ring for near instant engagement.
  • Centerlock and 6 bolt disc compatibility.
  • Interchangeable endcaps to fit different axle configurations.
  • 17mm full length axle diameter.
  • Straight pull spoke design for maximum strength.

Technical specifications

Hub types

  • Hubs are 135/142mm or 148mm boost
  • Endcaps are 5.5mm QR or 12mm TA
  • Spoke counts in 24 and 28 hole.

Size and weight

  • 245g with 12mm endcaps

Size 142mm x 12mm axle
Weight 154g

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Reactor Rear Hub

  • Brand: GravityWorx
  • Product Code: Reactor Rear Hub
  • Availability: 100
  • $249.99

Available Options

Tags: hub, rear, 142mm