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120 Wireless Cyclometer

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Sale price: LBP815,000.00

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The 120 cyclometer is designed for cyclists who want a straightforward wireless cyclometer to measure their performance.

Easy to install and easy to use. 5 essential functions (current/average speed, current/average distance and time) transmitted wirelessly.

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Sale price: LBP815,000.00

Regular price:

Product Features

A photo of the 120 Wireless Cyclometer in use

Parameter measurement

5 functions: current and average speed, ride and total distance, time.

Easy assembly / dismantling

Easy, wireless, tool-free fitting.Fixes onto your handlebar or stem.

Ease of use

3 easily accessible buttons. Very simple, intuitive menus.

Easy reading

Large figures on the display.


Watertight assembly, durable case.


The sensor fits all fork shapes (profiled or round).

Product Reviews

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3887 reviews

120 Wireless Cyclometer
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Bike computer

Very good

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For the low cost, you’re getting a lot. It’s easy to use and very accurate. I’m pleased with my purchase. Very high quality, but could do with a backlight.

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nice little computer easy to set up and just tells you the basics

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stopped working after 8 months

It stopped measuring before one year of using it. I tried everything to troubleshoot what was wrong including sensor placement, reset and battery change but nothing made it work again

Easy to install

Easy to install. Sometimes I got problem turning it off because it just resets but I think it's just me. I need to learn it better

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Excellent and more cheap

The only issue If it has light I didn’t check the manual and right now is the time unsetup weird. But good quality and good price

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Easy to fit and set up. Very useful and great value for money

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Poor item

Constantly having the change the batteries, also found it difficult to mount the sensor on my suspension forks.

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Thank you for your feedback regarding this computer. I would assume that if you keep having to change the batteries that there may be a running fault with your unit. Please don't hesitate to return it to store for a replacement if required.
Peter, Cycling Manager, DECATHLON
Very basic

Just purchased a new bike from Decathlon and decided to by this. Big mistake! On my other bike I have a £2.99 Sunding (purchased from Home Bargains) attached (albeit wired) which comes with 7 functions one of which is a cycle routine so all functions can be seen with a glance. I wasn't too bothered about the 4 functions because they were the ones I use mostly. What I didn't realise ids that whilst on the road the trip distance and average speed are not availiable whilst on the road. You actually have to stop to read them so it makes two of the functions a little pointless. The other problem is how the units are fitted to the bike which is with a glorified rubber band which makes it unstable on rough surfaces not to mention that if the rubber band breaks they would drop off onto the road. If you insist on buying one of these I'd add some other fixing alternatives such as tape or cable ties. My conclusion is that as a 'Cycle Computer' it's hardly fit for purpose and I shall be taking it back to request a refund.

Thank you for your valuable feedback about this computer. I'm sorry to read that you are not satisfied with the functions and the quality of the fixings. I have forwarded it on to the design team in charge of this b'twin 120 wireless computer.
Peter, Cycling Manager, DECATHLON
Not much use in the UK

I went to buy one of these as it looked just what i needed. Then i started looking a bit deeper. Please note: This model only measures in Kmh, NOT Mph. So not much good in the UK. There is no mention of this on the box. Come on, Decathlon, you need to sort out your information for the UK market.

Dear Sir,
Thank you for taking the time to post a review of this cycle computer. I have tested and used this product and rest assured that in the settings options you can select MILES or KM. To access the menu the procedure is demonstrated on the reverse of the instructions found inside the box. Pressing the top button on the unit for few seconds brings you to the settings menu where you can adjust the time, time format etc and if you continue to move through the menus you will come across MILES or METERS. Select the desired option and you're good to go. Should you have any further questions, please don't hesitate to get back in touch.
Peter, Cycling Manager, DECATHLON
Easy to fit and use

Only negative feedback is the way the unit clips onto the bracket which is flimsy. Works virtually all season.

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Something wrong here

I just bought it yesterday, seems to be set up properly, so I went for a 3 hour spin, Map my ride logged it at 43 miles, my cyclometer said 23 miles, and an average speed of 7.6 mph, something not right here? It also doesnt take into consideration any stops I made which makes the average speed inaccurate. I know it is entry level, but it serves no purpose really.

Hello there. Thank you for your review of this product. It is difficult to check the set up without seeing the computer on your bike, but please double check that the magnet and the senor are as close to each other as possible (5mm recommended) to ensure each wheel revolution is counted. If the distance is greater then it will affect the reading. Please do not hesitate to take it to your local store to be double checked or exchange if there is indeed a fault with the connection. 

MICHAEL, Road Cycling Leader, DECATHLON UK

Does all I want

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Very acccurate

Using it first time yesterday. Amazing in term of accuracy. Compare it with my 'Map my ride' app distance. After riding 36.85km. Amazing both indicate the same reading. However it did not come with a stop watch, when i stop for traffic light etc, it was not taken into account. Also start/ stop switch, it will auto off after 15minute if i stop for rest. Will all reading gone?

very excellent cycle computer

very good and does its job

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Additional Product informations


Inside room

  • 20% Printed Circuit Board
  • 40% Battery Lithium
  • 20% Copper
  • 20% Silicium


  • 10%
  • 80% Acrylonitrile Butadiene Styrene
  • 10% Epoxy


  • 100% Cellulose

Speed function

Current speed.Average ride speed (only visible once stopped).

Distance function

Ride distance (distance covered on that ride).Total distance (since you installed the cyclometer).

Time function


Swivelling sensor

The sensor fits any fork shape (round, profiled, etc.) and can be rotated to better align with the magnet on your spokes.


CaseHeight x width x depth: 46 mm x 39 mm x 15 mmDisplay :Height x width: 23 mm x 28 mm


CR2032 (1 in the cyclometer + 1 in the sensor).

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