The Q-Rings 110x5 BCD (Outer Aero) feature CNC-machined aeronautic-grade 7075-T6 aluminum alloy and steel shifting pins. Designed to work with the body’s biomechanics, the Q-Ring is characterized by 10% ovality. This slight change in shape produces greater pedal stroke efficiency and reduced fatigue. The Outer Aero 110x5 BCD Q-Ring is compatible with 9, 10, and 11-speed groupsets.
B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.
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Nice looking bit of kit
Donï¿½t use it on an e bike. Cranks rotate on that type of bottom bracket negating the effect. Otherwise I like it
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A guide to understanding and calculating bicycle gear inches.