Rotor OCA & OCP is a custom Garmin data field engineered for Rotor INpower and 2INpower power meters. It establishes a direct Bluetooth or ANT+ channel to capture and display your real-time Optimum Chainring Angle (OCA) in degrees and suggests the exact Optimum Chainring Position (OCP) setting for Q-Rings.
| Optimum Chainring Angle (OCA) | 92° |
| Recommended OCP Position | Position 3 |
| Stroke Average OCA | 91.4° |
Unlock Rotor's advanced mechanical torque metrics directly on your handlebars.
Streams raw Optimum Chainring Angle calculations at every pedal rotation, updating degrees instantly on your display without needing a computer.
Runs continuous torque-force mapping to suggest the perfect Optimum Chainring Position (OCP) setting (Positions 1–5) to align with your power peak.
Includes setting variables for crank angle offsets, ensuring perfect accuracy whether using standard chainrings or specialized Rotor Q-Rings.
Every rider has a unique pedal stroke, with their maximum torque peak occurring at a specific angle during the downstroke (usually between 85° and 110°). Standard circular chainrings do not account for this peak, maintaining identical resistance throughout the cycle.
Rotor Q-Rings utilize an oval design to maximize the gear ratio at your torque peak and minimize it at the dead spots. Finding the exact Q-Ring mounting orientation (OCP Position) requires knowing your personal Optimum Chainring Angle (OCA).
This Connect IQ data field brings this mapping directly onto your handlebars. It records your average OCA during segments, helping you adjust your physical chainring setup to maximize mechanical advantage.