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- Name / Model: Shimano Altus SL-M370 (left + right trigger / “RapidFire” shifter set), for 3×9 drivetrain (3 chainrings in front × 9 cogs in rear). eBay
- Role: These are the shift levers (shifters) that the rider uses to change gears (front & rear derailleurs) on a 3×9 system.