Each power meter starts off as a standard crank or crank arm. Once in the building, crank arms work their way through a multi-step process as they circle the facility.
We design our own custom fixtures that can be adapted for different crank arm lengths as they go through the etching process
A laser etcher prepares aluminum crank arms by removing the paint or anodized coating off the crank arm, as it can interfere with the application and function of the strain gauge.
Carbon arms are delivered with the clear coat removed from the area where strain gauges will be applied.
Every Stages power meter is individually calibrated. Units are first tested with a Bluetooth app with no weight applied and then again with a 90kg weight. A static test for accuracy is also performed. Data is recorded for each unit produced, allowing Stages engineers to track units back to production and compare values if a unit malfunctions in the field.