Prologue Performance Cycling are the premier stockist for Rotor cranks, rings and road bike components,  including the Rotor Q-Ring and the new Rotor Inpower crank.

Rotor Q-Rings

Q-Rings boost your performance by varying drivetrain resistance during pedalling in line with your legs natural strengths and weakness. They make better use of the strongest muscle groups (increasing positive work) and compensate for the weaker zones in the pedalling stroke (reducing negative work). Find out more about Q-Rings here.

30-day Q-Ring Guarantee

Sceptical about the Q-Ring? Prologue can offer you a unique 30-day guarantee for all models. This is a Rotor brick-and-mortar only offer and NOT available through any online stores.

You have 30 days from the time-of-purchase to ride, test and evaluate Q-Rings and follow the adaptation phase guide in order to determine your Optimum Chainring Position (OCP). If, at the end of the 30 days, after you have gone through the adaption phase and determined your Optimum Chainring Position, you are not satisfied, you can return the chainrings.

Rotor 2Inpower

Introducing Rotor’s innovative crank axle-based INpower power meter. By inconspicuously integrating its technology inside the bottom bracket, INpower becomes protected from shock, crashes and outside contaminants, plus maintains the bike’s original aesthetics. Due to the its position inside the frame, INpower can convert any ROTOR crank into a crank axlebased power meter.

Because INpower measures data in the left leg, cyclists who already own a current set of ROTOR cranks have the option to purchase only the left crank arm. Because it’s centered in the crank axle, INpower achieves cleaner data transfer and greater accuracy via ANT+™ protocol without succumbing to interruptions and temperature fluctuations. Sophisticated metrics like Torque Effectiveness and Pedal Smoothness determine total torque versus positive torque and average power versus maximum power respectively.