The shimano fc r3000 sora 9 speed chainset a 2 piece design double ring 9 speed chainset from the excellent value sora range sg x chainrings feature strategically placed chain pick up pins and tooth profiles to ensure fast and positive shifting shimano fc r3000 sora 9 speed chainset features 2 piece design allows the bottom bracket bearings to be spaced wider apart outboard the frame or press fit 865mm enabling the use of larger bearings and an increased axle diameter there