Garmin speed/cadence sensor issues
06-07-10, 03:27 PM
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Garmin speed/cadence sensor issues
I did my club's monthly TT on saturday, and I found quite an interesting problem with my sensor. First, I will note that I did not end up going with GPS (buyers remorse now) and that i am using the speed cadence sensor with one of garmin's running watches as my main bike computer. So the circuit is 18.7 miles, what do i get? 19.3 miles...
Why? Well, when i was descending down one of the long straight hills, i noticed my cadence go up above 105-110, and suddenly the speed said that I was going 60 mph, not kph. then when i stopped pedaling, it flipped back to around 37 mph. I am guessing this means the watch thinks my pedaling is just my wheel spinning when i am at high cadences.
Does anyone else have this problem? Is there any way to fix it? Is there a problem with my sensor?
Thanks.
Why? Well, when i was descending down one of the long straight hills, i noticed my cadence go up above 105-110, and suddenly the speed said that I was going 60 mph, not kph. then when i stopped pedaling, it flipped back to around 37 mph. I am guessing this means the watch thinks my pedaling is just my wheel spinning when i am at high cadences.
Does anyone else have this problem? Is there any way to fix it? Is there a problem with my sensor?
Thanks.
06-07-10, 03:56 PM
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Which garmin unit are you using?
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Litespeed, lasts a lifetime.
Specialized Tarmac, lasts a lifetime, or until it breaks.
Litespeed, lasts a lifetime.
Specialized Tarmac, lasts a lifetime, or until it breaks.
06-07-10, 04:17 PM
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if you get the crank magnet near the unit and don't pedal it will whack the readings. It'll kill the battery that way too if the bike is parked.
06-07-10, 05:20 PM
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FR60
I am really talking about pedaling at cadence of 100+ not stopped, when stopped it always shows 0 cadence, and a reasonable speed.
I am really talking about pedaling at cadence of 100+ not stopped, when stopped it always shows 0 cadence, and a reasonable speed.
06-07-10, 06:08 PM
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I have found Garmin customer service to be second to none. Give them a call and I am sure they will answer your questions.
Good luck and happy ridding.
Good luck and happy ridding.
06-07-10, 09:59 PM
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CCrew - Nice insight! I've occasionally seen cadence readings of 140+ from my Garmin 500 with speed / cadence sensor when I upload my rides to Garmin Connect. After reading your post, I realize that I might be "parking" the crank magnet next to the chainstay mounted speed / cadence sensor on long, fast descents. Hmm, I'll watch for it and report back. Anyone else care to jump in?!
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