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Old 08-04-10, 11:08 PM   #1
MinnMan
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Average Speed means different things on different cyclocomputers?

On my old bike, I had a Cateye Strada. When I stopped, for example, at a red light, the trip time counter also stopped. At the end of the ride, the calculated average speed was the distance/time traveling. When I bought my new bike, I installed a Sigma B1606L, and I assumed it worked the same way. However, recently I noticed that the trip time does NOT stop when I stop at red lights, and that Average Speed reading actually counts down while I sit there waiting for the light to change. Suddenly, I miss my Cateye!

so of the major brands/models of cyclocomputers, which ones sense when you are stopped and stop the trip time?
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Old 08-05-10, 06:15 AM   #2
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Both of the computers I use, two Cateye Mity 3s (of some age) and a new Knog NERD 9, calculate average speed using ride time, i.e. time in motion. They both stop timing when the bike is stopped.
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Old 08-05-10, 07:42 AM   #3
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On my old bike, I had a Cateye Strada. When I stopped, for example, at a red light, the trip time counter also stopped. At the end of the ride, the calculated average speed was the distance/time traveling. When I bought my new bike, I installed a Sigma B1606L, and I assumed it worked the same way. However, recently I noticed that the trip time does NOT stop when I stop at red lights, and that Average Speed reading actually counts down while I sit there waiting for the light to change. Suddenly, I miss my Cateye!

so of the major brands/models of cyclocomputers, which ones sense when you are stopped and stop the trip time?
I suggest looking in to your Sigma's settings. I have both of those computers and they seem to work the same for me, i.e. time stops when you are not in motion.
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Old 08-05-10, 11:04 AM   #4
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I suggest looking in to your Sigma's settings. I have both of those computers and they seem to work the same for me, i.e. time stops when you are not in motion.
Yeah, I checked, but didn't find any relevant information
http://www.sigmasport.com/us_media/p...visuals/ba.pdf
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Old 08-05-10, 11:24 AM   #5
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I had a Sigma (a few years ago, not current model). It did the same -- it did not time out for stops.
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Old 08-05-10, 11:54 AM   #6
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I have a sigma 1606L and mine calculates trip time only when moving also. Are you sure you have trip time and not time up, down or stopwatch?
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Old 08-05-10, 04:50 PM   #7
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Wireless? Does this happen all over, including further away from the city? You might be picking up a slow signal of some kind, enough to keep the time running but not enough to display speed. (I've never had a Sigma, though it probably handles interference better than the cheapo wireless computer I used to have.)

Otherwise, did you do this several times? If you stop at a light with the magnet right next to the sensor, normal little back and forth movements could do the same thing.
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Old 08-05-10, 08:47 PM   #8
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I always counted my time from garage door open to garage door shut, calculate from mile ridden. Maybe that's why my average is so low!
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Old 08-06-10, 06:37 AM   #9
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My BC1606L works like it "should" as in it only changes average speed based on time moving. It's a wired version though, so I can't speak to the interference problem, but it worked this way right out of the box. My previous Sigma computer (now on the wifes bike) works the exact same way. Wierd.
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