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Aero Round Outer Ring

Aero Round Outer Ring

Temporarily Out Of Stock

Don't get too bummed. This item is on the way and will be available for purchase as soon as it rolls into the warehouse.

Can't wait? Consider one of the other Gravel & Cyclocross Cranksets & Chainrings we have in stock.

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Why We Like The Aero Round Outer Ring

Saving watts is just the beginning with the Rotor Aero Round Outer Ring. Built for 110 BCD Rotor 4-bolt crank the aero outer ring is engineered to be incredibly stiff and offer an aero advantage over traditional designs. The ring uses cut-outs and a ramped shape in the aluminum to redirect airflow in a smooth pattern.


  • Aerodynamic chainring for Rotor cranks
  • Aluminum material is strong without a weight penalty
  • 110 BDC 4-bolt can fit more than just rotor cranks
  • Popular choice on track and time trial specific bikes
  • Item #RTR1WUB
Number of Rings
[outer] 46t, 50t, 52t, 53t, 54t, 55t, 56t, 58t
Bolt Circle Diameter
4 bolt
Claimed Weight
Manufacturer Warranty
2 years
cyclocross, gravel, road cycling, time trial