Fast stretches of road and powerful sprints call for the right gearing. The ROTOR Round Rings 39-tooth inner chainring is designed for sporty 2x road drivetrains with a 110x4 mm BCD. Paired with a suitable 53T outer chainring, it gives you the classic 53/39 gear combination.

Its round tooth profile provides a consistent gear ratio throughout the crank rotation. CNC-machined 7075-T6 aluminum combines precise manufacturing with the low weight of a road bike chainring. When installing, make sure the four-arm bolt pattern is compatible and that the chainring combination is approved.

Top features at a glance:

• 39 teeth: Inner chainring for a sporty 53/39 road gearing setup.
• Round profile: Consistent gear ratio throughout the entire pedal stroke.
• 110x4 mm BCD: For compatible four-arm crank spiders with the matching bolt circle.
• 7075-T6 aluminum: CNC-machined design for road bike drivetrains.

Technical specifications:

• Manufacturer: ROTOR
• Model: Round Rings
• Product type: Inner chainring
• Intended use: Road cycling
• Drivetrain: 2x
• Speeds: 2x10-speed / 2x11-speed
• Number of teeth: 39 teeth (39T)
• Compatible chainring combination: 53/39 teeth
• Bolt circle diameter: 110 mm BCD
• Mounting: 4-bolt (110x4 mm)
• Chainring shape: Round
• Position: Inner
• Material: 7075-T6 aluminum
• Manufacturing: CNC-machined
• Color: Black

Compatible with:

• Compatible ROTOR road cranksets with a 110x4 mm BCD spider and matching bolt pattern
• ROTOR INspider mounts with a compatible 110x4 mm fitting
• Compatible 2x10- and 2x11-speed road drivetrains
• Compatible 53T outer chainrings for 53/39 combinations

Included:

• 1 x ROTOR Round Rings 39T inner chainring, black
• Supplied in workshop packaging - securely packed, without the original packaging

Manufacturer part no.: C01-516-22010A-0 | EAN: 8434366015651

The ROTOR Round Rings 39T adds classic gearing to your road drivetrain for sporty riding.