Oval Rotor Q-Rings increase the power stroke by minimizing the intensity of the "dead spot" zones. For 5-arm spider with 110/60mm BCD. For Rotor REX 1.2; REX 2.2 and REX 3.2 cranks. 36/22 and 38/25T gear ratio for 29" MTBs.
Stronglight HT3 chainrings come with an extra hard surface for a long life time. Friction and abrasion are significantly reduced. Narrow-wide teeth profile for 1x drivetrains. Available with various teeth counts.