For 12-speed, aluminum, black direct mount, 8-bolt, without power meter, set Number of teeth 48 Type of article fastening Direct Mount Group affiliation SRAM Main color black Rear gear stages 12-speed Front gear stages 2-speed Lightweight, stiff, and durable: the SRAM Force E1 chainring delivers on all fronts. Thanks to its integrated construction, no pedaling power is lost. The design ensures fast, smooth, and precise shifting. X-Range technology also guarantees a wide range and smooth transitions. Sharp and precise shifting One-piece construction for optimal performance X-Range technology also guarantees a wide range and smooth transitions Sram Article number: Retail packaging: Yes