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Rotor USA

Rotor Q-Rings: Improved Performance through Engineering

Breckinridge, Colorado
Rotor Q-Rings:  Improved Performance through Engineering

The ROTOR Q-Ring is different from other ovalized chainrings; a new concept incorporating a patented variable regulation system (OCP) that applies some of the biomechanics of the Rotor Crank System to conventional cranks.

Q-Rings give you more power during the pedal down stroke, just after the moment you develop maximum power, when you are generating 90% of your power output.

Features and benefits:

  • OCP (Optimum Chainring Position), a Rotor patented feature is the secret to success, where others have failed. The patented OCP System allows you to choose the angle where you obtain the maximum gear ratio, customizing pedaling to each and every cyclist, where you need it most. Since the maximum power moment is different for every cyclist (performance is different depending on pedaling style and position on the bike), the OCP System customizes the Q-Rings to your body geometry, bike geometry and cycling habits, and to take the maximum advantage of alternative leg inertias on every pedal rotation. OCP is Q-Ring's bio-mechanical key!

  • Easier to pedal at high cadences when power requirements are higher.

  • Better Power Delivery due to the modulation of the gear ratio every moment. Good on the flats and rolling terrain, even better when climbing. Check the testimonials at

  • Mitigation of knee pains: Since Q-Rings demand less requirements of muscular forces in the upper dead-spot, the knee-joints are punished less than when using conventional cranks with round chainrings. Q-Rings minimize the variation of muscle requirements at the dead- spots which mitigates knee soreness. You may want to use the Q-Rings to reduce impact and damage to your knees instead of "pushing" your performance.

  • Quick adaptation: Q-Rings are designed to obtain a soft, comfortable way of pedaling with uniform muscular work, so they allow an easy and quick adaptation. Q-Rings give a smoother power transfer, maintaining traction on slippery surfaces, and avoiding the bobbing effect on suspension bikes.

How does Q work?
ROTOR Q-Rings do not eliminate the dead-spot (as do Rotor Cranks) but reduce its negative effects, moving the legs faster through the dead-spot and enabling the legs to obtain more strength on the power stroke. Q-Rings change the equivalent tooth size by increasing it when the rider is in the power mode (when more power is available at the pedal down stroke) and decreasing it through the dead-spots.

A 53T Q-Ring, at the upper dead-spot is equivalent to a 51T, but as the pedal goes down and more strength is applied (just passed the maximum power moment), the equivalent chainring tooth size reaches 56T.

About the Q-technology:

  • Lightweight & Quality: CNC machined from the highest quality lightweight aircraft aluminium, with a special nickel plated finish for extreme wear resistance.

  • Latest technology with simplest mechanics: Q-Rings are user friendly; easy to install and easy to find and change the regulation setting through the patented OCP System.

  • Affordable: prices are within the reach of every cyclist.

  • Designed and patented by ROTOR: Innovation and performance through our engineering at the service of the cycling community.

  • Fits most high-end bikes: Q-Rings are available in the following versions:

  • Road 53/40T for Shimano and other cranks using the 130 BCD (bolt pattern).

  • Road 53/41T for Campagnolo and other cranks using the 135 BCD.

  • Road 50/36 for FSA and other Compact cranks using the 110 BCD.

  • MTB 44/34/24T for MTB cranks (XT and similar), 104/64 BCD.

    (Other Q-Ring sizes will become available in the future)

  • Availability: Q-Rings will be presented worldwide to the cycling community at the main 2005 international Bicycle Shows: Eurobike-Friedrichshafen, EICMA-Milan, Festibike-Madrid, Interbike-Las Vegas, and Bike Motion-Utrecht

  • See the dates and booth locations below.

Hype or true?

Try it for yourself. The comments from the test pilots are very positive. Q-Ring test pilots are top racers achieving successful results. Feedback from Q-Ring test pilots is unanimous: easier and faster pedaling at high cadences, faster times in time trials (flat or rolling courses), much faster when climbing, a significant reduction in knee discomfort and a lower heart rate while achieving the same speed that they did with round chainrings on conventional cranks.

Try them and you will be surprised, Q-Rings do improve your performance and comfort.

For the names and contact information of Rotor Distributors around the world, please click

The dates and booth numbers where Rotor will be introducing Q-Rings at the International Cycle Shows, on bikes for test riding are:



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