These are BF crank screws (M16×1×12mm) specifically designed for Bafang M510 and G522 mid-drive motors.
They are the original size and thread for securing crank arms on these two models.
Specifications:
- Model: BF crank screw
- Thread: M16 × 1.0, length 12mm
- Material: High‑strength steel, black oxide finish
- Fitment: Bafang M510 / G522 mid‑drive motors
- Torque: 15 N·m (follow official manual)
- Package: 2 screws (for left & right crank arms)
Features:
- 100% match for original M510/G522 crank interface
- Anti‑rust, high torque resistance
- Direct replacement, no modification needed
- Essential for safe & stable crank mounting
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