Chris King's Boost 6-Bolt rear hub uses a one-piece solid axle and the patented 72-point RingDrive engagement system to put power into the dirt with virtually no lag, built for 148 x 12mm Boost-spaced MTB frames.

Highlights

  • Patented RingDrive system with 72 simultaneously engaged points of contact
  • One-piece solid axle for a stiff rear end
  • Heavy-duty bearing seals and a threaded driveshell seal ring against mud and water
  • Canted flanges for stronger wheel builds
  • 6-bolt disc rotor mount
  • Available in the Chris King colours listed below

Compatibility & fit

Fits 148 x 12mm Boost rear frame spacing with a 6-bolt disc rotor. Freehub body is a fixed choice per SKU — Shimano Microspline, Shimano HG (8-11 speed) or SRAM XD — and is not user-swappable between families without a Chris King driveshell change.

Sizes & options

ColourSpoke countFreehub body
Black32HShimano Microspline
Black32HSRAM XD
Silver32HSRAM XD
Black/Punch32HSRAM XD
Matte Jet32HSRAM XD
Matte Mango32HShimano HG
Midnight32HShimano HG
Chris King covers this hub, including its bearings, with the King Lifetime Warranty against manufacturing defects for the lifetime of the original purchaser. It does not cover damage from crashes, misuse, alteration, improper installation or normal wear and tear. For warranty support, return the product to Tune Cycles and we'll manage the claim with Chris King's Australian distributor.
  • Patented RingDrive engagement, 72 points of contact
  • One-piece solid axle for a stiff rear end
  • Heavy-duty bearing seals and driveshell seal ring
  • Canted flanges for stronger wheel builds
  • Available with Shimano Microspline, Shimano HG or SRAM XD freehub
  • King Lifetime Warranty
Axle standard148 x 12mm Boost
Rotor mount6-bolt
EngagementRingDrive, 72 points
Freehub bodyShimano Microspline, Shimano HG or SRAM XD (SKU-dependent, see Sizes & options)
Spoke drilling32H
Made inPortland, Oregon, USA
SKU SCV-P-9682
Brand Chris King