Speed/Cadence Sensor

GSC-10 Sensor UnitI installed a Garmin GSC-10 kit on the bicycle (at least part of it).  The candence piece went on without too much difficulty.  Unfortunately, the speed sensor is going to be a tad more trouble, but more on that later.  The GSC-10 is definitely made for an upright bicycle.

I mounted the sensor unit on the right side (facing the bike) of the main tube up where the crank arm would pass by it.  The two black tie wraps supplied with the unit were not long enough to go around the main tube; I bought a package of 14″ long black electrical tie wraps at Lowe’s.  These were longer than necessary, but I wanted sufficient length in case others issues cropped up.  Then, I attached the sensor, but did not pull the tie wraps tight; I wanted to be able to move the sensor for final alignment.

After aligning the crank pedal magnet in the correct position relative to the sensor I peeled off the tape backing and stuck it to the pedal.  Then I rotated the crank slowly; when the crank magnet passed the sensor the little red light came on.  Viola, the alignment was okay.

I tightened up the tie wraps on the sensor (don’t pull too tightly as the locking clip seems to snap off quite easily), then I attached the tie wrap on the magnet.  After testing it again to insure nothing was amiss I cut off the excess ends on the tie wraps.

The speed sensor is going to be another matter.  The speed sensor swing arm will not work on a recumbent bike, or at least the Giro 20 recumbent.  There are some wires attached to the swing arm.  My guess is the wires will have to be removed, lengthened, and the swing arm re-attached down on the front fork.  Since the front tire doesn’t turn when using the exercise machine I will save this project for a later date.

Linking the cadence sensor to the Garmin Edge 800 was not difficult at all.  I turned the Edge on, selected Menu, selected Setup (small wrench in right hand corner), Bike Settings, Bike Profiles (if your bike profile hasn’t been entered you need to create one for your bike), ANT+Speed/Cadence, Bike Sensors, select yes, back out to the Bike Sensors screen, Sensor Details.  At this point you may not find any indication of the the sensors.  If not, hold the Edge unit close to the GSC-10 sensor and continuously rotate the crank at a slow speed.  The Edge unit should recognize the sensor after a few moments, and then the ‘Not Connected’ notice will change to ‘Connected’.

I have used the bicycle on the mag trainer unit for 3-4 days now and the cadence feature is really nice; no more counting.  The down side is the front of the Edge is not lit under normal conditions so it can be difficult to see the cadence when indoors under low light; a small price to pay.


Cygolite Metro 300The weather has been so pleasant in the evening that I have gone for longer than expected rides, and several times I ended up finishing the ride in semi-darkness.

Enter the Cygolite 300.  I wanted an LED light, and one that could be recharged.  I didn’t feel I need something for riding in total darkness, soooo, I selected the Cygolite.  It met my requirements and the cost was within my pocketbook allowance.

First off, I bought a ‘T’ mount for the front of the bike.  I had to take a dowel rod and beat the spring steel locking nut down into the tube.  This was not easy as I think the nut is designed for a slightly larger tube.  I finally got the ‘T’ mount installed and then attached the light.  The ‘T’ bar is a smaller diameter than the light bracket, sooooo, I ended up wrapping electrical tape around the ‘T’ bar.  I left the ‘T’ bar installed even though I don’t use it at the moment.

The first time I took the bike out after dark I realized that the light sweeps the road when making a turn a lot different than the direct that the bike is taking.  Bottom line: I could see where I was steering very well.

Headlght Mouting

Soooo, I removed the light and mounted it on the handlebars near the center.  That seems to work a lot better for me.  Now, when I turn the light follows the direction of the handlebars.  Even though this is a lower lumens light (300), I feel that it does light the roadway very well.  It has a hi beam, medium beam, low beam, and a flashing beam.  The unit charges off of a USB wall or computer outlet.  I would buy it again if given the choice.

Headlight Mounting

Checking the Garmin vs. the Bontrager

After doing a little research, I discovered that the Bontrager Trip 2L was not set correctly for the front tire size on my bike.  Soooo, instead of having ridden about 60 miles I have only ridden about 47.  What a bummer.  Anyway, the book that came with the 2L was of very little help.  See additional notes under accessories.

I did a 12 mile ride and this time both units were in agreement as to the actual mileage.  I am now officially up to 59 miles.

I still haven’t remembered to adjust the front chain ring shifter, YET!  Also, I am going to look at some other type of mirror.  I do not feel real safe with the Zefal Spy Mirror.