Overview

Friction Facts utilizes custom designed, high precision test equipment and stringent protocols. The links below explain the design, operation, and practical use of each piece of equipment.

  • Chain Full Load
    The Full Load Test Method measures the frictional losses in a chain by using a similar torque-loading configuration as a typical bicycle drivetrain.

  • Chain Full Tension
    The Full Tension Test Method measures the frictional losses in a chain by using tension rather than load.  The accuracy of this method is +/- 0.02 watts.

  • Derailleur Pulley Efficiency
    The Reactive Torque Pulley Tester (RTPT) measure the frictional losses in a derailleur pulley, with similar loading characteristics the pulley would see during operation.  The accuracy of this piece of equipment is +/- 0.001 watts.

  • Pedal Efficiency
    The Pedal Efficiency set up measures the frictional losses in a pedal, with similar loading characterisitcs the pedal wouls see during operation.  The accuracy of this set up is +/- 0.02 watts.
  • Hub Efficiency
    The hub/wheel efficiency tester measures the friction created in the hub bearings. Accuracy is +/- 0.02 watts.

  • Bottom Bracket and Wheel Bearing Efficiency
    This tester measures friction in bottom bracket bearings and wheel bearings.  Accuracy is +/- 0.01 watts.  The bearing set alone is tested.  Pure radial and/or axial lods can be applied at varying loads and RPMs.