We're starting to see ovalized rings like the Rotor Mountain Inner Q Ring popping up everywhere, from the local criteriums to the marathon mountain bike race courses, but why The oblong shape of the Q Rings lends more leverage to the pedal stroke, extracting more power from your legs and more efficiency at the same time. The effect felt on the bike is a smoothing of the pedal stroke, less exertion to achieve the same speed and power output, and a reduction in that dead spot you feel during each rotation. The Rotor Mountain Inner Q Ring comes in a 26 tooth version with a BCD of 80, or a 27 tooth version with a four arm BCD of 64. It is designed for use with 10 speed drivetrains and is compatible with SRAM and Shimano drivetrains. For best performance, Rotor recommends running Q Rings in tandem with others unless, of course, you are running a single chainring drivetrain. For maximum benefit of the Q Ring design, install the chainring so that the long axis of the ring aligns with the crank arm.