Product Description

This is a replacement Speed Sensor kit for your BBS01/BBS02/BBSHD Bafang Mid-Drive kit.

  • Mounts on chainstay
  • Magnet must be installed 1-2mm away from Sensor (smooth face of the magnet facing sensor)
  • Includes Speed Sensor with mount, two-part threaded magnet, and magnet mounting screw

This video will help if you have an error 21 associated with the speed sensor: https://www.youtube.com/watch?v=r8vUEZcgqVw