GARMIN 010-10644-00 Speed/Cadence Sensor | 
| Brand: Garmin
List Price: $59.99
Buy New: $35.73
You Save: $24.26 (40%)
New (18)
Rating:  55 reviews
Media: Accessory
Autographed: No
Memorabilia: No
Fragile: No
Batteries Included: No
Size: Garmin Part #010-10644-00
Shipping Weight (lbs): 0
Dimensions (in): 3 x 2.2 x 2.7
Legal Disclaimer: Warranty does not cover misuse of product.
MPN: 010-10644-00
Model: 010-10644-00
UPC: 653886002028
EAN: 0653886002028
ASIN: B000BFNOT8
Availability: Usually ships in 1-2 business days
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| Features:
| • | Cycling speed sensor for select Garmin wrist-mounted personal trainers and cycling computers | | • | Self-calibrating, wireless design measures both cycle speed and cadence in pedaling strokes per minute | | • | Provides up-to-the-minute feedback or captures results for later workout analysis | | • | Compatible with Garmin Edge 305, Edge 305CAD, and Forerunner 305 | | • | Attaches easily to any bicycle; 1-year warranty |
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| Editorial Reviews:
Product Description
Monitor your pedaling cadence as you ride / Measures and reports your pedaling strokes per minute / Self calibrating
Amazon.com Product Description
A good companion for Garmin's Edge 305 and 305CAD cycle computers and the Garmin Forerunner 305 personal trainer, the GSC 10 monitors your cycling rhythm for up-to-the-minute results and later analysis. The self-calibrating, wireless unit measures both speed (in pedaling strokes per minute) and cadence , then provides feedback to the user for optimal performance. You can later feed the results to Garmin's Training Center software, which helps you tailor your workouts to meet specific goals and objectives. Like the Garmin heart rate monitor, the GSC 10 attaches easily to your bike, where its sensors detect signals from your wheels and send the information wirelessly to your personal trainer/cycle computer. It's also backed by a one-year warranty.
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| Customer Reviews: Read 50 more reviews...
 Excellent compact lightweight wireless cadence sensor November 22, 2007
Brad Jackson (Panama City, FL USA)
34 out of 34 found this review helpful
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!
 Design could be improved February 24, 2006
Ron Henson (Kirkland, WA)
17 out of 18 found this review helpful
The design could be improved upon as you need to have a magnet on both the crank arm and the spoke within 5mm of the sensor. This makes id difficult and may require some minor modifications on some bicycles (I needed to add a spacer between the crank arm and the magnet). Too much tilt towards the crank, risks having the arm of the sensor being caught in the spokes after a large bump on the trails or raod. I have known of other people being able to purchase a larger magnet to the inside of the pedal screw which allows the sensor to be farther appart. Other than that, it works great with the Edge.
It works August 13, 2006
W. Krauss (Rochester MN)
15 out of 16 found this review helpful
It has worked flawlessly on my TT and road bike. I use one Edge 305 and switch between bikes. When switching, you must go to the "Accessories" menu and rescan for the sensor. You must set this up exactly according to the directions and check the LED's in a dark room. You can not see them in a room with normal lighting. I do a fair amount of cadence based training and this cadence sensor has proved flawless.
 Doesn't work as advertised June 10, 2006
E. Varisco (Baltimore, MD)
10 out of 21 found this review helpful
I have this sensor on my road bike (works great), and thought I would get one for my mountain bike. This second sensor will not 'connect' with my Edge 305, and I've tried almost everything.
My Edge 305 picks up the other sensor on my road bike but will not recognize this second sensor. I believe it to be a technical issue about using two different sensors. Also, according to the instructions if you lose the GPS signal the sensor should be able to track speed and distance through this sensor---it doesn't work.
Garmin GSC 10 Speed Cadence Sensor November 9, 2006
Thomas L. Wilson Jr. (Hills of Tennessee)
9 out of 9 found this review helpful
Easy installation of sensor and magnets. Crank magnet come loose easily.
Pairing the sensor with the receiver unit can fail without much of an indication of the problem. Once the sensor is paired, the unit works very reliably.
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