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Speed/rate sensors kit for COUNT7 cyclometer.

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

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

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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Product benefits

    • Accuracy / precision
    • Coded wireless digital transmission (ANT+ 2.4GHz technology).
    • Compatibility
    • Compatible with all ANT+ cyclometers (including the "COUNT7" cyclometer)
    • Easy assembly / dismantling
    • Tool-free, fast and easy mounting on the chainstays.
  1. Guarantee : 2 Years

your reviews

3.6 / 5

23 reviews

15 people recommend this product

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Needs improved seals


cannot be used in wet weather


  (United Kingdom)

40-49 years old    Man

2 5

used for 3 to 6 months Had two of these on separate bikes and both failed within months with water entering the battery compartment. The sealing of the unit is only good for dry or indoor use.

Response of the brand

Dear Sir,
Thank you for your feedback.  I'm sorry to read that the sensor has not withstood wet weather.
I will forward this to the product manager at b'Twin.
Peter Lazarus UK Market Manager DECATHLON

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

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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