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Speed/rate sensors kit for COUNT7 cyclometer.

Cycling Computer Cycling - ANT+ Speed/Rate Sensor, Cycle Computer B'TWIN - Bike Accessories
  • Cycling Computer Cycling - ANT+ Speed/Rate Sensor, Cycle Computer B'TWIN - Bike Accessories
Reference : 8181211
Cycling Computer

B'TWIN ANT+ Speed/Rate Sensor, Cycle Computer

measuring the speed and rate (pedalling frequency). Kit for a second bike, 2.4 GHz wireless ANT+ coded transmission. Speed/rate sensors kit for COUNT7 cyclometer. ANT+ 2.4GHz coded wireless transmission. Compatible with all computers with ANT+ technology.

To view our full range visit our cycle computers category.

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free on orders over £70* - More information

Freedom of Return
find out more about our returns policy.

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Product benefits

  1. 1
    Accuracy / precisionCoded wireless digital transmission (ANT+ 2.4GHz technology).
  2. 2
    CompatibilityCompatible with all ANT+ cyclometers (including the "COUNT7" cyclometer)
  3. 3
    Easy assembly / dismantlingTool-free, fast and easy mounting on the chainstays.

Guarantee : 2 Years


your reviews

3.6 / 5

22 reviews

15 people recommend this product

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Supplied with dead battery


dead battery


  (United Kingdom)

30-39 years old    Man

4 5

used for 1 week or less Once a new cr2032 battery was fitted the test button gave a green light from the led. It then paired easily with my Garmin Fenix 2. Brilliant

Great price, for a good product - Magnet fell off.


Lost my magnet whilst out riding.


  (United Kingdom)

20-29 years old    Man

3 5

used for 1 week or less Was really pleased with this unit, cheaper than Garmin GSC 10. Easy to connect and attach to bike, however during a 90 minute ride, the magnetic on the crank for the cadence fell off....

Seems to work for me


A bit ugly, no online documentation


  (United Kingdom)

40-49 years old    Man

4 5

used for 7 to 12 months I had no problems installing this or getting it to work with my Garmin Edge 500. I've probably done over 1000 miles with it now, in various weather conditions, and it's still working.
BUT - the documentation that came with it isn't great and I may have thrown that away. I've contacted Geonaute asking for some information on it, the button on it a battery state indication? If so, does it show red instead of green when the batter is low? How long can I expect the battery to last overall (roughly) and how long have I got left when it starts to show the low state?
The response was a link to a (French!) quickstart document for their Count14 product which hardly mentions anything about the speed/cadence sensor!
While overall I'm pleased with my purchase, availability of proper online documentation (in English) for this needs improving.

Total rubbish


Did not work,


  (United Kingdom)

40-49 years old    Man

1 5

used for 1 week or less The sensor did not work, the installation instructions were totally shockingly poor!! Just don't bother buying one!!

Response of the brand

Hi Richard,
Thanks for your feedback on this product, we are so sorry to hear that it did not perform as you wished. I will pass on the mail to the product manager in France. As we exercise a satisfied or satisfied guarantee on all our products, if you could please return the product for an exchange (for another model) or a full refund, we would be grateful.

Pete Lazarus Market Manager

Good - but seems to have durability issues

Great - it does exactly what it should



  (United Kingdom)

40-49 years old    Man

4 5

used for 7 to 12 months First up - it's half the price of the Garmin GSC-10 and it does the same job. It's easier to position and appears to be more durable than the Garmin piece but I have had two here in less than a year go bad - losing the ability to detect pedal cadence (swapping new for old and keeping exact same positioning it works again - so not a magnet position issue, battery changed in both cases and no improvement - so not battery life either).
That said - it lasted longer (for me) than the Garmin and it's half the price - *almost* a disposable item.
The instructions on the device are very light - but the basic is that it needs to be active to pair - activation happens when one or other of the sensors detects the magnet passing by - so spin the wheel or crank (or simply pass the magnet past one of the sensors to wake it)
Despite the negative of durability - I'll still replace these ones like-for-like.

Information / Concept / Technology

Restricted use :

Only compatible with computers with ANT+ technology.

this product has been designed with following concepts

GEONAUTE me, my environment, my community

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