Improve your performance by using oval chainrings! Oval chainring with 10% ovality. At the point of greatest power output, the Q-ring has the largest diameter, at the top dead center is the smallest diameter. With the patented OCP system adjustable in 5 positions to your own driving style and needs. Easy adjustment without crank disassembly, so the different settings are easy to test. CNC milled and durable due to hard anodized surface.