Praxis Buzz 110BCD chainring. The Buzz chainring series features cold forged chainrings, which provide greater hardness and better wear resistance than CNC-machined chainrings. In addition, this process offers the advantage of easy application of LevaTime. LevaTime is a unique technology where all teeth have their own design, ensuring that a chain shifts perfectly from the inner to the outer chainring. Buzz chainrings are available in 110BCD: 46/36, 48/32, 50/34, 52/36 and 130BCD: 53/39 tooth combinations. Suitable for 10, 11 and 12-speed chains. Includes a replaceable chain catcher pin. For optimal shifting performance, it is perfect for use in combination with Di2, EPS or eTap shifting systems. Compatible with mechanical and electronic shifting systems from Shimano, SRAM and Campagnolo.