Oval Q-Ring chainrings for your 110x4 BCD Shimano 6800 and 9000 crank efficient 10% ovality where the smallest diameter is at the weakest point of the pedal stroke and the maximum diameter at the strongest point of the pedal stroke. Shimano aero Q-Rings offer 3 Optimum Chainring Positions (OCP) that can be adjusted to take advantage of the pedal stroke's most-productive zone. Compatible with Shimano Ultegra 6800 and DuraAce 9000 Hollowtech II cranks only.
Weight:
173g per set 52A/36
Sizes:
Outer- 54A, 53A, 52A, 50A, 46
Inner - 44, 36 , 34t
Characteristics:
- 100% CNC-machined, 7075-T6 aluminum alloy
- Aero design: reinforced rigidity and aerodynamics
- Steel shifting pins
- 3 OCP points (2-3-4)
- Designed to work with 11 speed groupsets
- Specific bolt covers for improved aesthetics (sold separately)
- Compatible with Shimano Ultegra 6800 and Durace 9000 Hollowtech II cranks only