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Old 06-21-10, 02:39 PM   #1
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Question Cateye Astrale 8... no instructions on radius for cadence sensor

Hi everyone,

I almost bought the Strada 200 from Cateye. After reading some reviews that it bonks out when wet, I decided to go with a Astrale 8 from Nash. So many reviews on how good and reliable this computer is. Anyways, just got it in the mail and setting it up. I just have no clue where to setup the cadence sensor. Doesn't distance from the center of the crank matter when setting up the cadence sensor? I don't see any instructions on how far out I should tie the sensor down. Is the error in distance negligible? Does it really matter how far out it is?
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Old 06-21-10, 04:10 PM   #2
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I'm not an expert on this, but I would think it wouldn't make much of a difference since cadence is about how many revolutions per minute the crank makes. So as long as the sensor is reading properly you should get accurate results.
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Old 06-21-10, 06:05 PM   #3
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Yeah it just counts the revolutions of the crank (same as for the wheel)-- tick, tick, tick, ... (<<=== these are silent internal ticks, one per revolution, each time the magnet passes the sensor). The closer together the ticks are, the faster your crank (or your wheel) is turning. For cadence, the computer is just figuring out RPMs.

I thought you were posting a question about how to set your wheel diameter/circumference, so the computer can figure out speed and distance properly. The computer counts RPMs for your wheel as well. If it knows the correct circumference, 'C', of your wheel, it can figure out how far and how fast you're going, since each revolution of your wheel correlates to C distance traveled.
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