Shimano SG-3S30 is a 3-speed hub specifically designed for smoother shifting and enhanced performance on various terrains. It offers three distinct gear positions: [1] for uphill slopes, heavy loads, or riding against strong winds; [2] for regular riding conditions; and [3] for achieving higher speeds. With its user-friendly PPS lever, you can effortlessly change gears while pedaling, making your rides more efficient and enjoyable.