Publicado Por En julio 28, 2026 Designed for105 FC-1055 ,600 FC-6400, andDura-Ace FC-7400 cranksets, this52T oval chainring with a130BCD combines cutting-edge Biopace technology with precision engineering. TheSG Narrow design is ideal for improving pedaling efficiency, reducing fatigue, and maximizing performance across a range of riding conditions.