Using Oval Chainrings with Garmin Power Meter Pedals

Rally and Vector power meter pedals assume constant angular velocity within a single crank revolution. For most riding conditions and bike set-ups, this assumption allows the pedals to report power within its stated accuracy.

Garmin has not determined the variance in angular velocity when using oval rings in real riding conditions. As a result, we are unable to state any impact that may appear with power values. This is likely a function of how elliptical the rings are, and the pedaling style of the rider.

Rally and Vector pedals takes multiple samples per crank revolution and has the ability to determine a micro-cadence. For the best accuracy, we recommend using a circular ring set on your bike.