Shimano SL-M315 Rapidfire+ 3 Speed Left Lever BSS-000140 X-Horizon: This rear derailleur’s “straight

X-Horizon: This rear derailleur’s “straight parallelogram” design limits all movement to the horizontal axis

Features slots for 6 and 8mm hex keys to ensure compatibility with 6 and 8mm internal hex pedals

ProWheel alloy cranks

Works With: TSL-100

directional tread design

Shimano SL-M315 Rapidfire+ 3 Speed Left Lever BSS-000140 X-Horizon: This rear derailleur’s “straightAbout Shimano SL M315 Rapidfire+ 3 Speed Left LeverFor reliable mountain bike shifting, SHIMANO's SL M315 RAPIDFIRE shift lever is suited to quick shifting and reliable shifting. Features 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