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#1
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Polar Speed Sensor - New Madone Fork?
I've got an '08 Madone 5.5. Pro. The fork has a rather thin leading
edge on it which does not allow for much adjustment of the speed sensor for my Polar 720. The speed sensor is shaped to fit on a round fork so it isn't very adjustable on the madone fork: http://www.polar-heartrate-monitors....eed_sensor.htm Has anyone come up with a fix here? It is possible to use a rare- earth metal magnet or something on the spokes to increase the "reach" of the signal? Right now the sensor is about 1cm from the magnet. It's ~2mm on my other bikes. |
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#2
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Polar Speed Sensor - New Madone Fork?
On Feb 15, 6:29*pm, Andrew F Martin
wrote: I've got an '08 Madone 5.5. Pro. *The fork has a rather thin leading edge on it which does not allow for much adjustment of the speed sensor for my Polar 720. * The speed sensor is shaped to fit on a round fork so it isn't very adjustable on the madone fork: http://www.polar-heartrate-monitors....eed_sensor.htm Has anyone come up with a fix here? *It is possible to use a rare- earth metal magnet or something on the spokes to increase the "reach" of the signal? *Right now the sensor is about 1cm from the magnet. It's ~2mm on my other bikes. move the magnet near the hub; it will be closer to the fork; get a roll of duct tape; tape the sensor in the best pick up location; **** aesthetics, it works |
#3
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Polar Speed Sensor - New Madone Fork?
On Fri, 15 Feb 2008 15:29:01 -0800 (PST), Andrew F Martin
wrote: I've got an '08 Madone 5.5. Pro. The fork has a rather thin leading edge on it which does not allow for much adjustment of the speed sensor for my Polar 720. The speed sensor is shaped to fit on a round fork so it isn't very adjustable on the madone fork: http://www.polar-heartrate-monitors....eed_sensor.htm Has anyone come up with a fix here? It is possible to use a rare- earth metal magnet or something on the spokes to increase the "reach" of the signal? Right now the sensor is about 1cm from the magnet. It's ~2mm on my other bikes. I do not know how sharp the leading edge of your fork is but my Specialized and my Aeirus forks are not round. I get the sensor plenty close to the magnet. Within a few mms. Both measure about 1.75" and 1" thick where the sensor is mounted. They both have a taper on the leading edge. No knige edge as that would be dangerous but sort of egg shaped. |
#4
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Polar Speed Sensor - New Madone Fork?
On Feb 15, 4:01*pm, wrote:
On Feb 15, 6:29*pm, Andrew F Martin wrote: I've got an '08 Madone 5.5. Pro. *The fork has a rather thin leading edge on it which does not allow for much adjustment of the speed sensor for my Polar 720. * The speed sensor is shaped to fit on a round fork so it isn't very adjustable on the madone fork: http://www.polar-heartrate-monitors....eed_sensor.htm Has anyone come up with a fix here? *It is possible to use a rare- earth metal magnet or something on the spokes to increase the "reach" of the signal? *Right now the sensor is about 1cm from the magnet. It's ~2mm on my other bikes. move the magnet near the hub; it will be closer to the fork; get a roll of duct tape; tape the sensor in the best pick up location; **** aesthetics, it works I tried that, but the signal from the sensor isn't strong enough to send the signal to the monitor mounted on the stem. I may need to cobble together a new mounting bracket. |
#5
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Polar Speed Sensor - New Madone Fork?
On Feb 16, 2:00*am, Andrew F Martin
wrote: On Feb 15, 4:01*pm, wrote: On Feb 15, 6:29*pm, Andrew F Martin wrote: I've got an '08 Madone 5.5. Pro. *The fork has a rather thin leading edge on it which does not allow for much adjustment of the speed sensor for my Polar 720. * The speed sensor is shaped to fit on a round fork so it isn't very adjustable on the madone fork: http://www.polar-heartrate-monitors....eed_sensor.htm Has anyone come up with a fix here? *It is possible to use a rare- earth metal magnet or something on the spokes to increase the "reach" of the signal? *Right now the sensor is about 1cm from the magnet. It's ~2mm on my other bikes. move the magnet near the hub; it will be closer to the fork; get a roll of duct tape; tape the sensor in the best pick up location; **** aesthetics, it works I tried that, but the signal from the sensor isn't strong enough to send the signal to the monitor mounted on the stem. *I may need to cobble together a new mounting bracket.- Hide quoted text - - Show quoted text - sorry to hear that. you tried a new battery as bill sornson says ? the sensor should be good enough for a front fork as I had mine mounted on my rear seat stay for recording my trnr events- the overall distance was about 1 m; I had to move mine to the front when I went outdoors because the signal wouldn't reach to my handlebar from the rear |
#6
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Polar Speed Sensor - New Madone Fork?
You might want to ask your LBS if the newer Polar CS-series
transmitters work on the same frequency. Those come with two separate fork mounts: one for rounded, and another for sharp-edged fork blades. |
#7
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Polar Speed Sensor - New Madone Fork?
On Feb 15, 6:29*pm, Andrew F Martin
wrote: Has anyone come up with a fix here? *It is possible to use a rare- earth metal magnet or something on the spokes to increase the "reach" of the signal? *Right now the sensor is about 1cm from the magnet. It's ~2mm on my other bikes. Assuming it's a magnet distance to sensor issue you can homebrew a mag holder, epoxy a magnet to a spoke, or if you prefer a commercial solution you could try one of the Sigma "power magnets". http://www.sigmasport.com/us/produkt...punkt=features Mark |
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