The Q-Rings is an oval road chainring for sporty 1x or 2x drivetrains. With 39 teeth (39T) as an inner chainring and a 4-arm mount, asymmetric (110x4 mm), this version is designed for the ROTOR drivetrain described.

The oval Q-Rings geometry changes the effective gear ratio throughout the crank rotation and uses 12.5% ovality in this version. It is designed for riders who want to consciously tune their pedaling to the ROTOR oval concept.

Top features at a glance:

• Oval Q-Rings profile with 12.5% ovality
• 39 teeth as an inner chainring for 53/39 road gearing
• CNC-machined 7075-T6 aluminum with BCD 110x4 mm mounting interface

Technical specifications:

• Manufacturer: ROTOR
• Model: Q-Rings
• Product type: Oval inner chainring
• Intended use: Road cycling
• Drivetrain: 2x
• Speeds: 2x11-speed
• Tooth count: 39 teeth (39T)
• Intended chainring combination: 53/39 teeth
• Bolt circle: BCD 110 mm
• Mounting: 4-arm mount, asymmetric (110x4 mm)
• Chainring shape: Oval
• Ovality: 12.5%
• Position: Inner
• Material: Aluminum 7075-T6
• Manufacturing: CNC-machined
• Color: Black

Compatible with:

• ROTOR road bike cranks with a matching BCD 110x4 mm spider
• ROTOR INspider power meters with the corresponding BCD 110x4 mm mounting interface
• Shimano Dura-Ace FC-R9100 and Ultegra FC-R8000 cranksets with matching 4-arm mounting interface
• Suitable 2x11-speed road bike drivetrains
• Matching 53-tooth outer chainrings for the 53/39 combination

Scope of delivery:

• 1x ROTOR Q-Rings oval inner chainring with 39 teeth, black
• Packaging: Original packaging

Manufacturer part number: C01-038-22010A-0 | EAN: 8434366016139

For a road drivetrain with a tooth count, mounting interface, and chainring combination that are properly matched.