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Improve your performance by using oval chainrings! Oval chainring with 10% ovality. The Q-ring has the largest diameter at the point of the greatest force output, the smallest diameter is at the upper dead center. Adjustable to 3 positions matching your individual riding style and requirements thanks to the patented OCP system. Straightforward adjustment without disassembly of the crank, allowing for simple testing of the various positions. CNC milled and durable due to hard-anodized surface. This chainring is suited for mounting on 60 mm bolt circle diameter 5-arm 2-speed cranks in inner position.