170mm Aluminum Alloy Bike Crank Arm Set for Mountain and Road Bikes Left Arm Replacement With Square Hole Interface Black Rhombic Hole Design Beefy Pro Grade Lightweight Durable High Strength Crank Component for Replaceable Drive Train

170mm Aluminum Crank Arm for MTB & Road Bikes - Left
✔️ 170mm left arm, aluminium alloy, square or rhombic hole (1x)

This left hand crank arm is a replacement part designed for a wide range of bikes, including road, mountain, folding, and fixed-gear models. It provides a reliable connection between your pedals and drivetrain, with options for square or rhombic hole interfaces.

✅ Material: Aluminium Alloy
✅ Length: 170mm (approx 8.07in)
✅ Weight: approx 200-214g
✅ Hole options: Black-Square Hole; Black-Rhombic Hole; Silver-Square Hole; Silver-Rhombic Hole
✅ Interface: Left side (Square or Rhombic)
✅ Includes: 1 x Crank Arm

💡 What is a left crank arm used for in a bike drivetrain?

A handy component that attaches to the left side of the crank to drive the pedal and transfer power efficiently.

- Compatible with 170mm crank length and 1x drive systems
- Supports square and rhombic hole interfaces for flexibility
- Made from aluminium alloy for light weight and high strength
- Fits road, mountain, folding and fixed-gear bikes