Rotor Q-Ring Chainring for Campagnolo The Dead Spot Eliminator Even the most experienced cyclists have "dead spots" in their pedal strokes, a portion of their pedal stroke in which significantly less power is being transmitted. Rotor has set out to eliminate this issue by engineering an ovalized chainring, designed specifically to smooth out your pedaling and fill in those dead spots-creating a significantly more balanced, optimized pedal stroke. This helps to generate more power and alleviate rider fatigue. The Q-Ring chainring features 10% ovalization and has 5 Optimum Chainring Placement (OCP) points, to really dial things in. Rotor designed the Q-Rings with steel shifting pins to improve shift quality, as well as a stiff aerodynamic design to further improve shifting and save even more watts. This ring is engineered to work flawlessly with 113BCD Campagnolo cranksets, finally bringing oval chainring technology to Campy drivetrains. Features10% ovalization is designed to optimize your pedal stroke by eliminating dead spots Engineered to work with Campagnolo drivetrains with a 113 BCD measurement Aerodynamic design also increases shift performance and lateral stiffness5 Optimum Chainring Placement points allow you to fully customize chainring placement Designed and manufactured in Spain the headquarters of Rotor Bike components Steel shift points provide reliable shifting performance SPECIFICATIONSDrive Train Speed9, 10 & 11 speed Campagnolo groupsets Tooth Count35, 36, 50 & 52t options Bolt Center Diameter113 BCD Campagnolo Material CNC-machined 7075-T6 aluminum alloy Intended Use Road, Road Race, Triathlon Weight Approximately 169g per set (53/40t) | Rotor | Q-Ring Chainring For Campagnolo 50 Tooth, 110Bcd | Aluminum