My spoke magnet works fine. I don't know the brand or anything about it -- a mechanic at the LBS put it on the bike for me, probably when I first bought the bike and they were setting up my old Polar cycle computer for me.
I do have problems with the speed sensor on my mountain bike not working, even when it is hitting the magnet as the wheel spins. That bike has a low-end Bontrager computer on it. I haven't yet tried to figure out what the problem is with it.
- Gray 2010 carbon WSD road bike, Rivet Independence saddle
- Red hardtail 26" aluminum mountain bike, Bontrager Evoke WSD saddle
- Royal blue 2018 aluminum gravel bike, Rivet Pearl saddle
Gone but not forgotten:
- Silver 2003 aluminum road bike
- Two awesome worn out Juliana saddles