Friction Facts utilizes custom designed, highly accurate test equipment and protocols. The links below explain the design, operation, and practical use of each piece of equipment. Friction Facts also provides these pieces of equipment and custom designs for the cycling industry. For information on purchasing test equipment, please see the Testing Services page.
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.
The hub/wheel efficiency tester measures the friction created in the hub bearings. Accuracy is +/- 0.05 watts.