Shimano M310 Shift Lever The Shimano M310 Shifters make for a solid upgrade to any 3x7 flat bar setup. In true Shimano fashion, the M310 shifters offer smooth, effortless shifting that won't miss a beat. The ergonomic lever shape is easy on the hands and quick to engage, while the optical gear display allows you to see where you're at in the range so you always have an idea of what gear you're in. Shimano M310 Shift Lever Precise and easy action shifting actuation Ergonomic lever shape Easy to read optical gear display Left: 3x front Right: 7-speed rear | Shimano M310 7 Speed Shift Lever Black, 3 Speed, Left