Last Updated: May 5, 2026 Oval chainrings (made by Rotor, AbsoluteBlack, Wolf Tooth) vary the effective gear during the pedal stroke — easier through the dead spots, harder through the power phase. Studies show 2-3% efficiency gains for some riders, with no benefit (or even discomfort) for others. Below, we explain the science, the brands, … Continue reading The Oval Chainring Explained: Is Oval Better Than Round?