I do a fair bit of cycling and had purchased a Garmin Forerunner 305 last year to track my rides, as well as for my wife to train for a mini-triathalon. Well, we bought it with an optional cadence sensor (which counts your rpm, like on an exercise bike), but have never tried it yet.
Tonight, I decided to go ahead and put the sensor on my bike and go for a test ride. Luckily it was just around the neighborhood because when I got home and uploaded my ride data, the cadence data had stopped after about a quarter of my ride! I was thinking: “Crap! I hope the sensor didn’t fall off!”
Well, that’s exactly what happened: I went out to the garage – now it’s about 11:00pm – and sure enough, the pedal magnet was missing from my pedal crank! The tie-strap is still on, but I guess the crank was tapered and the thing slid down it until it was loose enough to fall off. I suppose that’s what tests are for.
The cadence sensor option wasn’t cheap; it’s about $50-$55: Well worth hunting around in the dark for a while. I grabbed a flashlight and went down to the spot where the sensor quit (starting where I turned the corner). I was searching with the street light and the flashlight, seeing some pretty cool insect night-life but no sensor – it’s about the size of your average piece of gravel lying on the street and it’s black, also around the same size as many a beetle I saw hanging around.
I kept walking. Cars drove by and I acted cool like I had a reason for meandering about the middle of the road at 11-something at night with a flashlight. Finally, I was about to give up and turn around, since I was pretty far down from where I thought it fell off, and then I saw it! Praise the Lord, I found it! Lying right in the middle of the street! I was so excited, I came home and wrote this post.
It’s definitely been driven over, because the face is nicked a bit, but since this part only houses a magnet, I’m confident it will work. Later, I’ll have to get some strong double-sided tape, tighten the heck out of the tie strap, and make sure this thing stays on!