CHRIS KING Boost 6-Bolt Matte Gold 50th

Matte Gold 50th commemorates Chris King's 50th anniversary in 2026.

Chris King Boost 6-Bolt hubs are precision mountain-bike hubs for Boost spacing, using heavy-duty seals and serviceable in-house bearings. The rear uses RingDrive™ with 72 simultaneous points of engagement.

• Engineered, manufactured, and assembled in Portland, Oregon, USA
• King Lifetime Warranty, subject to the manufacturer's terms
• Boost spacing: Front 110×15mm / Rear 148×12mm
• 28H / 32H, depending on the variants shown
• Steel / ceramic bearing options depending on the variants shown
• Completely rebuildable with the Universal Hub Tool

[SPEC]

Front
Axle: 110×15mm Boost
Flange diameter DS / NDS: 57.4mm
Center to flange DS / NDS: 36.3mm / 27.3mm

Rear
Axle: 148×12mm Boost
Flange diameter DS / NDS: 57.4mm
Center to flange DS / NDS: 23.8mm / 36.3mm
RingDrive™: 72 simultaneous points of engagement
Driveshell: Shimano HG / Micro Spline / SRAM XD, depending on the variants shown

Gen 4 conversions and driveshell changes depend on hub generation and serial number. Confirm the serial number before ordering conversion parts.

Chris King hub support and service documentation