Rohloff Disc Brake Adapter for 160 mm Rotors

Item number: 63719
  • 100 day return period
  • Online since 1998
  • Trusted Shop 4.89 / 5.00

Dissipate torque - Rohloff support adapters

With all gear hubs, the axle tries to rotate while riding. When riding in a reduced gear (1-10), the axle wants to turn backwards. When driving with a gear ratio (12-14), the axle wants to turn forward. The torque with which the axle tries to turn is called the support torque. The size of the supporting moment depends on the load and the gear engaged, and must be absorbed by an appropriate anti-rotation device on the frame. With the simple three-speed hub, a flat-milled axle in the dropouts is sufficient. With a high-performance gear hub such as the Rohloff Speedhub 500/14, the support must be much more stable because of the large gear ratio range.
To transfer the torque of the Speedhub to the frame, support adapters and a matching axle plate are required.

Technical Information:

Adapter Material:
Rotor Size:
160 mm


rear IS to PM:
  • Frame Mount: international standard
  • Caliper Mount: post mount
  • Compatibility: 135 mm, 142 mm, 148 mm, 170 mm, 177 mm dimensions
  • Type: Monkey Bone
  • Manufacturer Number: 8553


Monkey Bone
The Monkey Bone is an adapter to transfer the support torque for the Rohloff Speedhub 500/14 directly to the frame. To use the Monkey Bone you need a Speedhub 500/14 equipped with an OEM2 axle plate (TS or CC), a frame with International Standard (IS) for disc brake mounting and a Post Mount disc brake caliper (PM). The Monkey Bone is not compatible with IS brake calipers (see Speedbone) or frames with integrated/direct post mount (see PM Bone).
The Monkey Bone (IS-PM adapter) is placed from the inside on the fastening eyelets (on the seat stay) and screwed to the PM brake cylinder (follow the brake manufacturer's torque specifications). Not compatible if the fastening eyelets are on the chain stay!

For a safe OEM2 installation with Rohloff Monkey Bone, the fastening eyelets on the brake cylinder mount must be made in one piece with the dropout, comply with the international standard (IS 1999/2000) and the material thickness of the dropouts and fastening eyelets must not be less than 6 mm.

The Monkey Bone must not be used (with CC/TS axle) on frames where the fixing point of the brake mount (IS 2000) is in front of the parallel/vertical line through the axle/dropout. In the low/small gears of the Speedhub 500/14, very high forces (up to 98% of the force applied via the crank) act, which could potentially cause the axle to be rotated out of the dropout.

OEM2 mounting is only permitted on bicycle frames that have been approved for this by the frame manufacturer. Without the approval of the frame manufacturer, the use of this mount is done at the user's own risk.


  • 1 x Rohloff 160 mm disc brake adapter
  • not incl. bolts


  • black/rear IS to PM, out of stock

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