Garmin GSC 10 Speed/Cadence Bike Sensor by Garmin
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Digital camera reviews of Garmin GSC 10 Speed/Cadence Bike Sensor
Digital camera Review: Excellent Rear Wheel Mount
Summary: 5 Stars
Love the intergrated cadence and speed sensor. Self calibrating to boot. Mounting was very easy and the 305 detected it immediately.Digital camera Review: Excellent compact lightweight wireless cadence sensor
Summary: 5 Stars
Another handy piece of equipment from Garmin!
This kit comes in three basic parts; a sensor unit, which is about the size of a matchbox, and two magnets about the size of your pinky nail. Several zip-ties are included for mounting purposes; the entire kit weighs at most a couple of ounces.
Installation is pretty straightforward, but do follow the directions carefully and don't snug down the zip-ties until you're sure you've got all three components just where you want them and have tested the system!
The sensor mounts to the left chain stay with a pair of zip-ties. Garmin thoughtfully added a piece of rubber padding to the bottom of the sensor unit, so it won't rough up your fancy carbon frame or your paint job :)
A single zip-tie attaches the crank magnet to the crank, although I had to use a large (3/4") shim on my FSA crank (which has a curved profile and a hollow back) to place the crank magnet in the proper position for the sensor to "see" it. The spoke magnet clamp has both a round hole and a square hole; make sure you use the right hole for your spoke profile! I mounted mine on a spoke directly opposite the tire valve, just to help keep the wheel in balance.
The sensor unit must be positioned along the chain stay such that it can "see" both the crank magnet as it passes by the cadence sensor (the round part on the side of the sensor unit), and the spoke magnet as it passes the speed sensor (the part that looks like a lever in the picture).
Testing is accomplished by pressing a small button on the sensor unit, which prompts it to flash a red LED, then a green one to indicate that testing is started. As pointed out by another reviewer, the LEDs are hard to see in bright ambient light; I'd recommend testing in a garage if possible. Hi-intensity LEDs would have solved this problem, although I suspect these LEDs were chosen for their low power consumption, so maybe it's a smart design decision after all.
Once the test button is pressed, the next 60 revolutions of the crank should cause the red LED to flash when the crank magnet passes the sensor, while the spoke magnet passing the sensor should generate a green LED flash. If you saw the red/green flash when the button was pressed, but don't see a flash as each magnet passes the sensor, chances are one or both magnets are not properly aligned with the sensor (there are alignment lines on the sensor and both magnets), or the magnets are passing too far from the sensor (this is the problem I encountered and solved with a shim).
When you're sure everything is in the right places, snug the zip-ties and cut them flush. Then set up a screen (typically the Biking screen) on your 305 to display Cadence in one of the data fields, and go ride!
Digital camera Review: Excellent interface - also talks to Trek ACH Digital
Summary: 5 Stars
Purchased this device to synch with my new Garmin 310XT. Turns out the ANT communications simultaneously works with my Trek bike computer - which is sweet! So, I could use my Trek HR monitor strap and get rid of the temperamental Trek sensors (that wouldn't talk to my Garmin). The beauty is that I can monitor cadence, speed and HR on the Garmin and the Trek simultaneously. That means faster transitions from swim to bike to run since I can just keep the Garmin on my wrist.
Nice to get unexpected "features" when buying a product.
Digital camera Review: Excellent unit
Summary: 5 Stars
I have three of these sensors on a 26" mountain bike, 29er, and a road bike. All work perfectly and I am able to move my Garmin 305 to any bike I own. Very cool stuff. This unit is not optional if you want accurate distance information from the garmin, especially on a mountain bike. GPS signals can be lost in canyons and trees. This sensor keeps the computer honest.Digital camera Review: Exelent Product
Summary: 4 Stars
I bought a Garmin Edge 750 and it works fine. The Edge 750 mesure velocity through the GPS but when you are riding and don't receive the satelite signal, you can use the Garmin 010 to do it. Also you can check the cadence.