320 Wireless Cyclometer



Made for measuring and analysing your cycling.
4-function, wireless cyclometer, easy to install!

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Ease of useIntuitive interface, simplified programming, large ergonomic buttons.
Parameter measurement4 functions: speed / partial distance / total distance / clock.
Easy assembly / dismantlingVery quick and easy tool-free fitting on the stem or handlebar. Wireless.
Easy readingLarge display and numbers for quick and easy reading.
DurabilityWatertight assembly, durable case.
Waranty2 Years
Information / Concept / Technologie
Inside room : 30.0% Copper (CU), 20.0% ALLOY, 20.0% Epoxy, 20.0% Glass - Fibre (FG), 10.0% Battery - Lilo Structure : 100.0% Acrylonitrile butadiene styrene (ABS) Elasticised band : 100.0% Silicone


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Was OK, but durability questionable
Used for 2 to 8 weeks
Bought one to monitor distance over a month, unfortunately the sensor unit has stopped working after it came loose from the cable ties after a mere 45km's on a turbo trainer and took a small tumble. Would have expected it to be more robust considering the units function.
B,TWIN 320 wireless cyclometer
Used for 1 week or less
It's ok for the money. I have a app on my iPhone that does the same but the 320 is not the same after the ride my app said 25 miles the 320 said 21 miles
great value
Used for More than 2 years
I have had 2 of these before, there quite robust and long battery life.
Budget cyclometer
Used for 2 to 8 weeks
This cyclometer is slow to start displaying your speed when you first set off and the display contrast is not great making it difficult to read in some lights. Overall it works so for the price its pretty good.
Fiddly installation & not ideal for larger bikes
Used for 1 week or less
This was far more difficult and frustrating to install than my previous (Halfords) cycle computer. The instruction sheet relies on rather confusing drawings rather than explanatory text and I didn't find it very helpful. More worryingly, the maximum distance between the sender unit you mount on the forks and the computer is 25.5 inches/65 cm. This means that, if you have a large adult framed bike with slightly elevated handlebars, the magnet and sender unit have to go near the very outer rim of the wheel - and even then I had to bend the sender unit until it almost touched the spokes to get a reading.
OK, so this is a pretty cheap unit, but the quality and functionality is very disappointing and I wish I'd paid a bit more at Halfords!
Response of the brand
Thank you for your feedback on this product. Thankfully a totally new design is due out shortly which does away with the need for a magnet which can only be mounted on the front wheel.
The new models use a gyroscope wrapped around either hub with much better distance (up to 3m) allowing you to use is it on either the front or rear hub which is great for turbo training.
Magnets always have short distances as they can interfere with other computers but as this is coded it will not occur.
This is a web preview link to the new computer: https://www.decathlon.co.uk/500-wireless-cyclometer-id_8382195.html
Peter Lazarus UK Cycling Market Manager DECATHLON
Grant found this answer helpful
Awful cycle computer.
Used for 3 to 6 months
Worked for about 5 mins then stopped working.
Response of the brand
Please return this item to us for a refund or an exchange. If the unit is faulty then it is covered under warranty.
Peter Lazarus UK Cycling Market Manager DECATHLON
Good basic computer
Used for More than 2 years
I have 3 of these, one on each bike as a backup so I don't have to look at my app on my phone or watch. Easy to fit and the computer has a few options to how/where its fitted
good price
You need to know how to fix it
At the beginning i thought it does not work .. but then I read one of the replies which says the magnatic piece facing the small arrow in the sensor and bend the sensor so close to the magnatic piece then it will work

Cycle computer does not work
Used for 1 week or less
I set this up per the instructions. The instructions are quite poor but it is not that complicated. However I spun the wheel around expecting the speed to measure and nothing happens. The sensor on the wheel shows a green light. The computer on the handlebars has been set up. The wireless connection between the two does not seem to work. This is both frustrating and disappointing. The video shows the computer working by just spinning the wheel. It is a shame there is no way to test what the issue is. It simply does not work.
Response of the brand
Hello Paddy,

Sorry to hear you are having issues with the Cycle Computer. In regards to the set up, you need to make sure the magnet sweeps less than 5mm away from the sensor, it also needs to be at the corner of the sensor where the arrow is located.

If it still doesn't work then I  would suggest you return it to your local store for a refund/exchange.

Rob Basnett b'Twin Product Expert DECATHLON
Used for 1 week or less
Perfect for mountain biking
Tracks speed, Total distance and trip distance
Doesnt have AVG speed
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