Quick Change Bolt-On Adapters


GPSR Quick Change Bolt-On Adapters
Bolt-On Quick Change Adapters fit Carbon Fiber wheels, Tough Hubs, and Barnes Style hubs. Each adapter is precision machined to save weight while maintaining strength.

Custom widths are available

Quick Change Sprocket and Brake
All adapters use ‘Quick Change’ knock-off nuts. The knock-off nuts spin off and on for quick changing of sprockets and brakes.

Knock-off nuts
GPSR offers two(2) Styles of knock-off nuts that fit all GPSR 2 ½-12 UN 2B threaded wheel adapters. 2-winged nuts or round nuts are available. For easy removing and tightening of the nuts, use the GPSR Knock-Off Nut Wrench.

For symmetrical wheels, use a right and left adapter that is the same width. If you need to offset the wheel, use right and left adapters with different widths. We have 4 standard widths, but we will make them to any width you need.

Standard Widths:

  • 1.125” Wide
  • 1.250” Wide
  • 1.625” Wide
  • 2.0” Wide

Bolt Kits
Adapters are attached to the hub using eight(8) machined 5/16 SHCS: 4 long and 4 short. Bolt Kits include 8 machined bolts, nylock nuts, and washers.

Sealed bearings are included and come pre-installed.

Ceramic Bearings
For reduced friction, optional ceramic bearings are available.

Quick Change Rear Disc Brake Mount

  • For Yamaha 10.5” disc brake with 6 point attachment

click to enlarge
Quick Change Rear Disc Brake Mount (click to enlarge)
Brake Mount
Knock-Off Nut (click to enlarge)
Knock off nut


September 22, 2015
GPS Racing | Quick Change Bolt-On Adapters | GPS Racing
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