Shimano M310/M315 Derailleur SL-M315-L Light shifting operation, wider compatibility, and suitable for internal cable routing Slim main lever body RAPIDFIRE PLUS Streamlined cockpit experience Gear display positioned below the handlebar Numbered gear display indicates gear position at a glance OPTICAL GEAR DISPLAY SL-M315-7R SHIMANO - RAPIDFIRE PLUS - Right Shift Lever - Clamp Band - 7-speed For reliable mountain bike shifting, SHIMANO's SL-M315 RAPIDFIRE shift lever is suited to quick shifting, giving riders the ability to downshift three gears in one stroke. Light shifting operation, wider compatibility, and suitable for internal cable routing Slim main lever body RAPIDFIRE PLUS Streamlined cockpit experience Gear display positioned below the handlebar Numbered gear display indicates gear position at a glance OPTICAL GEAR DISPLAY SL-M315-8R SHIMANO - RAPIDFIRE PLUS - Right Shift Lever - Clamp Band - 8-speed For reliable mountain bike shifting, SHIMANO's SL-M315 RAPIDFIRE shift lever is suited to quick shifting, giving riders the ability to downshift three gears in one stroke. Light shifting operation, wider compatibility, and suitable for internal cable routingSlim main lever body RAPIDFIRE PLUS Streamlined cockpit experience Gear display positioned below the handlebar Numbered gear display indicates gear position at a glance OPTICAL GEAR DISPLAY FD-M310 Speed :7/8 speed Weight:about 205g Suitable for 34.9mm diameter bike frame Attention:Clamp ring is 34.9mm.If you need a adapt ring for 31.8mm please note in your order. Installation Type:Direct Mount Number of teeth:48/42T Front tooth difference:10T Total tooth change:20T RD-M310 Color:Black/Silver,send random Speed :8S,also for 7S Teeth of freewheel:34T max,11T min Weight:about 300g

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