ISSUE SA HENG SENSOR DISC ⎮PAANO AAYUSIN? - YouTube
Bosch Global - The sensor discs constantly monitor the speed of both wheels and act as signal generators for the wheel-speed sensors. Read more: bit.ly/e-bike-ar | Facebook
Amazon.com: 5V Laser Photoelectric Speed Sensor Encoder Code Disc Disk Code Wheel for Freescale Smart car Cutting Quadrature Signal Output : Toys & Games