Training and promotion happen over a professional rider's career. With excellent mechanical quality and the exquisite balance between weight and rigidity, QED series can cope with the stringent demand for equipment during training or competition, and let riders feel the power of mechanical properties all the time. QED lightweight split chainring adopts the widely popular 110BCD 4-bolt specification in the market, which reduces weight and has more comprehensive compatibility. The QED Lightweight Split Chainring is perfectly compatible with the Magene flagship product QED P505 power meter and PES P505 base power meter. The QED Lightweight Split Chainring is compatible with 11 and 12-speed groupsets from Shimano. Incompatible crank types: Shimano cranks and similarly shaped crank styles. Made of 7075 aircraft-grade aluminum alloy with excellent physical properties, these chainrings offer abrasion resistance, deformation resistance, high stiffness and ultralight weight. The overall chainring only weighs 143g while maintaining such excellent performance. According to the stress contour based on FEA technical analysis, we strengthen the structural design of the part under concentrated stress. Therefore, it can reduce the deformation under heavy load. *QED light-weight split chainring has passed more than 100,000 fatigue tests and more than 40,000 kilometers of endurance tests. *Data comes from Magene Lab.