Threadless Speed Sensor
YST BB-993 SPEED SENSOR
This BB set speed sensor uses infrared sensing technique.
The photodiodes is embedded inside the BB set. It is fully protected by the shaft case.
Intelligent electric component and circuit design detects only forward movement and generate corresponding speed signal.
This design is fully compatible with the original 68MM length BB shell.
1. Sensor embedded
2. Fully sealed
3. Moisture and Dust proof(Pass IP-X5 test)
4. Easy to install (Threadless Patent Design)