Help - Cadence Counter Crank Magnet

[oz rider]

I use a small rare earth magnet which fits over the crank key hole. Couple of dollars; no sticky, definitely no zip tie!

[pinsonp2]

Not particularly attractive, but electrical tape works to hold the magnet and it still works. The tape comes in assorted colors..

P2

[feral1]

I have the Garmin 500 with the cadence and my magnet stays on but I can't for the life of me get it to actually read.

[Becky]

In the past, I've used some "poster putty" to fill up that gap before zip tying the magnet in place. Whenver possible, I use Oz's suggestion.

[goride]

Lots of good ideas here, thank you. My magnet came with the sticky back, but it didn't stick and even near the pedal end, it was too recessed to be read. I have read about the rare earth magnet and that would be a consideration as well and as several pointed out, it would look better without the zip tie. I have also thought about some kind of putty or something to fill the hollow before attaching the cadence magnet. What I was wondering about that, is if I would also need to put putty in the corresponding spot on the other crank, so as not to create some kind of imbalance that would cause wear and tear? (I'm kind of thinking like when wheels are out of balance - perhaps I am overthinking this.)

[dianne_1234]

I have also thought about some kind of putty or something to fill the hollow before attaching the cadence magnet.

Seems like some kind of epoxy putty would be great for this.

What I was wondering about that, is if I would also need to put putty in the corresponding spot on the other crank, so as not to create some kind of imbalance that would cause wear and tear? (I'm kind of thinking like when wheels are out of balance - perhaps I am overthinking this.)

Definitely overthinking. No need for a counterbalance.

[nscrbug]

I have the Garmin 500 with the cadence and my magnet stays on but I can't for the life of me get it to actually read.

Are you making sure that the magnet lines up exactly with the "line" on the sensor? There is also a tiny light on the sensor that will flash green when it picks up a signal from the cadence magnet, and red when it picks up a signal from the speed magnet. Are the batteries in the sensor fresh? That's all I can think of at the moment.

[goride]

Got it! I ordered a couple of small Cateye magnets which someone mentioned in another area of the TE forum. I like them better than the style of magnet that came with my Garmin because the zip type passes through the magnet case instead of over the top of the case. The magnet is sticky backed, but still didn't stay attached to the crank. I used the zip tie which came with it, but with the hollow back, and the crank being straight and not tapered, I still found it sliding back and forth on the crank. I took a couple small pieces of dark gray water pipe insulation foam, and shoved them between the zip tie and the back of the crank. Problem solved.

I did have a "duh!" moment on yesterday's ride. I looked down and saw that my cadence was not registering, then I realized I was "coasting." Oops.

[TsPoet]

I use a small rare earth magnet which fits over the crank key hole. Couple of dollars; no sticky, definitely no zip tie!

+1
me, too, since +1 isn't long enough.