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.
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.