Kris Holm Spirit Disc Cranks

Kris Holm Spirit Disc Cranks
Kris Holm Spirit Disc Cranks Kris Holm Spirit Disc Cranks Kris Holm Spirit Disc Cranks Kris Holm Spirit Disc Cranks
Brand: Kris Holm
Model: Double Hole, Disk 127/150mm
Availability: In Stock
Price: $120.00

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Spirit Double Hole Disk Cranks

Strong. Light. Disk brake compatible. Spirit disk cranks result from a sophisticated effort to develop the highest possible strength to weight ratio and pedalling performance in a unicycle crank.

Spirit disk cranks allow installation of a standard disk brake rotor (not included) to the right hand crank. This enables the rider to install a disk brake (see compatibility requirements below) and maintain an efficient pedalling stance, minimal weight, and the strongest possible wheel geometry. The rotor attachment is hardly noticeable for riders choosing not to use disk brakes. All cranks have double pedal holes for versatility.

Features:7050 Aluminum (similar yield strength but tougher than 7075 Al)

  • Over 25% lighter than KH Moment cranks
  • Compatible with most hydraulic disk brakes (see compatibility requirements below)
  • Shaped to avoid ankle bone bashing and heel clipping
  • Shaped to optimize shifting for KH/Schlumpf geared hubs
  • Double pedal holes for versatility
  • Lengths (mm): 110/127, 110/137, 127/150, and 137/165
  • Weights: 378 g (110/127), 402 g (110/137),  432 g (127/150)
  • Disk rotor compatibility: 160 mm or larger, International Standard (IS) mount

Compatibility Requirements: (Per Kris


  • Disk brake with International Standard (IS) mount or IS adaptor.
  • Brake caliper must clear 20 mm slot between disk rotor and inside face of crank. Tested on Magura Marta, Bengal Helix, Shimano BR-M575, and Shimano BR-M765 hydraulic disk brakes. Will fit most hydraulic disk brakes but not guaranteed to fit mechanical disk brakes.

Disk Rotors

  • 160 mm or 180 mm (160 mm recommended)

Compatible Frames

  • Requires IS brake mount on right fork blade or bearing housing, and 20 mm or narrower bearing housings (to ensure clearance of disk rotor bolts).
  • Fits KH frames produced after June 2012. Other frames may require modifications. Older KH frames may require filing the outside face of the bearing housing to clear the disk rotor bolts. User frame modifications void the KH warranty.

Compatible Hubs

  • Standard 100 mm ISIS unicycle hub with 154 mm or longer axle.
  • Recommended brake line lengths: 80 cm (KH24, KH26, KH29); 105 cm (KH36)



Important Warning for Use of Spirit Cranks with KH/Schlumpf Geared Hub

KH/Schlumpf geared hubs contain a knurled (rough) bearing on one side. This knurled bearing surface acts as a brace against the tightened bearing housing when you are in high gear mode. Because crank-mount disk brakes apply braking force through the crank, braking in second gear may apply additional force to the knurled braking surface beyond that experienced during normal pedalling.

This additional force may increase the risk of slippage of the knurled surface. Slippage problems were not identified during testing. However, given the newness of this braking technology and wide range of users, we cannot guarantee that slippage of the knurled bearing will not occur for all users under all conditions. Slippage of the knurled bearing in the frame while riding in second gear will most likely lead to falls and could lead to possible injury.

Riders using Spirit Disk Cranks with KH/Schlumpf Hubs do so at their own risk. Check the tightness of bearing housings on a regular basis. If you experience slippage, do not use disk brakes with the KH/Schlumpf hub.


Installation Instructions

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