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  1. #1
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    Polar CS400 and losing signal from fork

    I'm having issues with my CS400 losing signal from the fork sensor. I've tinkered with the sensor and magnet a ton.

    It will fade in and out while on a ride.

    Any thoughts?

  2. #2
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    I've got a CS100 that seems to be doing the same. Get home from a ride and see that my distance and average speed are all up the wazoo. I swap the head unit between my mountain bike and road bike, so thought I would swap out the fork sensor to see if one is not working. This seems to have isolated the problem, so I need to get a new speed sensor by the look of it.

  3. #3
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    Is it on the front or back of the fork? I've had better results when mounted on the front as it aims the antenna 'up' as opposed to 'down'

  4. #4
    Ted
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    I threw away a VDO HRM because it would not work reliably. I replaced it with a Cateye Wireless but kept the old wheel magnet. Funny thing, the Cateye had problems too. I replaced the wheel magnet and all was well. Too late to save the (probably good) VDO.

  5. #5
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    I had nothing but trouble with my polar cs200

    Same thing as you, it would not reliably get a signal from the wheel sensor. Tried Bigger magnets, other placements etc etc, and finally gave up on the thing. Its in a box around here somewhere.
    Honestly I would suggest a Garmin GPS unit. The wheel magnet is a clever idea, but its just a constant source of problems on a bike that gets beat around off road. You can get a garmin 205 or 305 for not all that much more, and it collects data way more reliabily and mine has been 100% problem free in almost 1.5 years of use 3 or 4 times a week. The GPS units give you so much more info, and just blow the cs series out of the water. Its also easier to move between bikes.
    Visiting St george/Hurricane? Stay at my vacation rental. Discounts for MTB's

    http://www.vrbo.com/392904

    PM me

  6. #6
    Slowest Rider
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    My CS400 sensor failed too

    Straight out of the box, my front wheel speed sensor didn't work.

    After a lot of debugging, I finally sent it back to Polar for repair and since then it works fine.

    It could also be it's low on batteries.
    It's not slow, it's doing more MTB time.

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