From a mechanical standpoint, the Stages Power left-side power meters are fully compatible with Osymetric, Q-Ring, Absoluteblack, and other non-round chainrings.

Power measurement via a Stages Power meter is event-based, where an event is defined as one complete pedal revolution. Due to the variations in velocity that non-round chainrings introduce during an 'event', you may observe that your power readings are higher compared to those obtained with a round chainring, which maintains a consistent velocity throughout each event. Based on our testing, and using a hub-based meter as a control, we have determined that there will be a 4-5% increase in the readings from a Stages Power meter when paired with non-round chainrings. The discrepancy in readings will vary depending on the ovality of the chainring in use. We advise you to consider this factor when transitioning from round to non-round chainrings, as you may need to adjust your functional threshold power accordingly.