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Description
The Rotor Q Ring Inner Chainring 39T 130BCD is the answer to reducing your dead spot in the pedal stroke and improving your maximum power effort. It uses a subtle, but efficient, 10% ovality that literally cuts down the amount of time you spend in a reduced power zone and elongates the area where you produce the most power for a more efficient ride.
Weighing only 155g, the Q Ring doesn’t add any weight to your chainring set up, and thanks to its 100% CNC-machined 7075-T6 aluminium alloy construction, it offers all the stiffness you need to maintain an unparalleled power transfer.
Designed to work with all 9, 10 and 11-speed groupsets, Q Rings provide everything you need to fine-tune your performance and improve your riding. This includes the 5 Optimum Chainring Positions (OCP) that allow for precise changes in your riding style, allowing you to pinpoint your maximum performance on the bike.
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Important Update for Our US Customers
We regret to inform you that due to ongoing challenges related to current US tariffs, shopping on Sigma Sports is temporarily unavailable for customers based in the United States.
We understand how disappointing this may be and sincerely apologize for any inconvenience caused. Please rest assured that we are actively exploring solutions to resume service and find the best way to support our US community.
We appreciate your patience and understanding during this time, and we look forward to welcoming you back as soon as possible.
If you require any further assistance, please reach out to the customer services team
— The Sigma Sports Team