Description
Usage: for road bike crankset 110BCD 4 arms model 4700/5800/6800/9000 R7000 R8000 R9100.Tooth option: Round 50-34T(145g), 52-36T(149g), 53-39T(165g).Aluminum 7075 material and full CNC process. Ensure lightweight but durable lifespan..Speed: 8,9,10,11,12speed support..Package content: 2 units chainrings inside. They are a pair.