Technology

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Our  crank set  increases the speed/power ratio of cyclists by up to 4 % by reducing the effect of the dead spots during the pedal revolution. 

This is achieved by fiber composite leaf springs inside each hollow crank arm. They allow the cyclist to maintain cadence using a chainring with one or two extra teeth without spending more energy. The end result is more effective use of  power applied at the pedals when it is most needed:  Going  uphill, sprinting or accelerating. The novel crank set  reduces the need for a front derailleur and, in mountain bikes with rear suspension, it reduces pedal kickback.

We have developed aluminum proof of concept crank sets with external springs for scientific testing, seen in action here:

https://www.youtube.com/watch?v=_MLzJrRWNcE&feature=youtu.be

Our carbon lightweight versions with internal springs are based on the same principle of limited spring action and are  targeted for commercialization. 

The novel drive train has an integrated power meter based on the unique operation of the crankset. Strain gauges are not needed. Instead we use cost-effective, accurate and fast sensors measuring left and right torque independently at sampling rates up to 1500 Hz. Torque profile, power and the usual metrics can be displayed in real time on  GPS cycling computers or smart phones using  ANT+ or Bluetooth  wireless protocols. The Bill of Materials for the power meter is less than $20.

Our proprietary technology is protected by several issued and pending patents, including US Patents  9,403,576, 9,809,275  for a proof of concept crank set and power meter. US Patent 11,142,281   and its foreign equivalents were granted for the lightweight version with fiber composite springs inside hollow carbon crank arms. This version is targeted for commercialization. Performance improvement of the drive train has been scientifically tested and confirmed at Eastern Michigan University by an  academic team led by professor McGregor, an expert in power measurements and their interpretation. The Aluminum proof of concept crank set is shown during testing at the University on: 

https://www.youtube.com/watch?v=vyn8EGjm2gA