My speed sensor ( haibike adventr FS with Flyon 120nm engine ) is dead and unfortunately there is no sensor available in Europe or elsewhere ! How can I fix it, replace it with another brand or model, please help me , this bike cost me a lot and it is dead now ! thanks for helping ! 180161
Welcome to the forum,
@pop22540eye. I can feel the frustration through the screen, so let's see what we can do.
Your bike runs the Flyon HPR120S motor, which is a TQ-developed unit with up to 120Nm of torque. The speed sensor on these is a proprietary Haibike part, integrated into the left frame dropout, and it uses
an 18-signal disc that reads speed per wheel rotation. Unfortunately, being a Haibike-specific component from a discontinued platform, new stock is genuinely scarce.
That said, the bike isn't necessarily dead. Here's what I'd try, in order:
1. Before replacing anything, confirm the sensor itself is actually dead and not just misaligned.
The user manual specifies a minimum 0.7mm gap between the sensor and the disc, and getting this right has solved the problem for multiple owners on this forum.
One member found their sensor was bent and touching the disc, and after heating and straightening it, it was properly adjustable again. Check for corrosion on the connector too; a squirt of contact cleaner has brought sensors back from the dead before.
2. Source options. MTBIKER.shop lists the Haibike TQ Flyon Speed Sensor, though stock may fluctuate.
