







Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.
🚴♂️ Ride Smarter, Not Harder — Stay Connected, Stay Ahead!
The Magene S3+ Speed/Cadence Sensor is a lightweight, wireless cycling accessory that accurately tracks your RPM via Bluetooth or ANT+ connectivity. Designed for both indoor trainers and outdoor road bikes, it offers dedicated speed or cadence modes, automatic power-saving hibernation, and broad compatibility with leading fitness apps like Zwift and Wahoo Fitness. Its durable, IP66-rated build ensures reliable performance in all conditions, making it an essential tool for data-driven cyclists aiming to optimize every ride.

























| ASIN | B08252X8VS |
| Battery Type | Lithium Manganese Dioxide |
| Best Sellers Rank | #6,788 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #3 in Cycling Computers |
| Brand | Magene |
| Brand Name | Magene |
| Color | Black |
| Connectivity Technology | Bluetooth |
| Customer Reviews | 4.0 out of 5 stars 4,974 Reviews |
| Display | LCD |
| Display Type | LCD |
| Global Trade Identification Number | 08414775870867 |
| Human Interface Input | Buttons |
| Included Components | Battery, Magnet |
| International Protection Rating | IP66 |
| Item Dimensions L x W x H | 1.17"L x 0.33"W x 1.51"H |
| Item Weight | 9 g |
| Manufacturer | Magene |
| Manufacturer Part Number | S3 |
| Model Number | S3+ |
| Mounting Type | ['Stem Mount', 'Handlebar Mount'] |
| Number of Items | 1 |
| Product Dimensions | 1.17"L x 0.33"W x 1.51"H |
| Sensor Type | Cadence Sensor, Speed Sensor |
| Unit Count | 1 Count |
V**R
It just works with Apple Fitness
The Magene speed/cadence sensor paired with my Apple Watch quickly and has been completely trouble-free. Once installed, I never have to think about it. When I start pedaling, it automatically connects and reports cadence in the Apple Fitness cycling app. It has been reliable, accurate, and easy to use. For anyone wanting cadence data without spending a lot of money, this has been an excellent addition to my bike.
S**Y
For Cadence, Does the Job
The first device I received won't wake up - perhaps the g-sensor was stuck. The exchanged item, quickly provided by Amazon, works great. I've only used it for cadence, so I can't speak to the speed function. Because it doesn't require a magnet, and the sensor is held onto the crank with a standard elastic loop, it's effortless to move between bikes and ideal for spin bikes. As per usual with these devices, the instructions are marginal. Before opening the sensor to remove the battery insulation plastic, note the position of the push tab at 6:00 and the positions of the open and closed indicators at 11:00 & 12:00. Each time you remove and reinstall the battery you'll have about 3- to 5 seconds to see the color of the flashing LED to determine if it's in cadence or speed mode. Once installed, pedal for 5- to 10-seconds to wake-up the sensor, so it can be paired with your receiver or thereafter, display cadence.
A**R
Don't Purchase: Battery Life is Far Less Than Claimed
I purchased the Magene S3+ to use in "speed mode" on my stationary spin trainer. The sensor seems to be reasonably accurate; however, it really burns through batteries. I complete an intense 60-minute ride each day, but the batteries only last about three weeks- that's roughly 20 hours of ride time. I test the voltage of the new battery and it shows 3.37 volts. Three weeks later, when the sender connection begins to fail the voltage is about 2.80 volts - essentially the voltage of a discharged 3V battery. The manufacturer claims 400-500 hours of use between battery changes. I thought maybe I received a defective unit, so I exchanged it for another one. Unfortunately, I experienced the same problem with the replacement unit. It seems as if the sending units never switched off (this is suppose to happen automatically when not in use). Maybe Movann (seller) actually means the battery will last 400 hours after it has been installed: 20 days x 24 hours = 480 hours? I hope not! Regardless, I'm going to find a better speed sender that doesn't require the hassle of having to replace a battery replacement every three weeks! It shouldn't be this difficult to find a simple speed sensor that likes up to its claims! I now have no interest purchasing Magene products in the future.
D**D
MyWhoosh not good in Bluetooth but fine in ANT+
Got this for virtual indoor training. Had trouble with consistency. Contacted customer service. Pretty standard...did you check all the normal things, battery etc then said to get a replacement via Amazon, which was seamless. Got the replacement and it was doing the same thing, erratic RPM readings. Found out that it doesn't give good consistent RPM readings in MyWhoosh when in Bluetooth but when you switch to ANT+ it works fine. It also worked fine for both onelap and Zwift In both Bluetooth and ANT+
D**E
Nice piece of kit!
Overview: I needed a speed sensor for my new bike computer, and started looking at the various ones around. I bought this one primarily because of the low cost. It installed easily via two rubber bands around the hub of my front wheel. It paired with my existing bike computer instantly, and supports both Bluetooth and ANT. The accuracy seems correct, and there is very little latency on a speed change and a display change. Pros: 1. Price is great! 2. It paired right up to my computer. 3. Small. 4. Easy to install on a hub. 5. Low latency. Cons: Really, none... Conclusion: I have purchased a second one for Cadence, so I am happy with it. I would, and did buy a second one. What more can I say!
G**O
Awesome addition to my bike
I love this addition to my bike. It has helped a lot on maintaining a constant rpm instead of concentrating on speed. Anyways, connection to my watch and bike display was easy. You do have to pay attention to which light blinks on this gadget to sync cadence or speed(I believe). I have had same battery in it for 3weeks(about 100miles), and it seems good. I do keep a spare battery in my riding emergency kit because I like this addition. I will definitely be giving these out for gifts to my biking friends.
P**P
Simple and Easy
I have purchased several sets for different bikes. They program fast, Install FAST, easy to change battery. Will easily sync with Garmin and other cycling odometer equipment.
B**B
Doesn’t last forever!
Stopped working after five years… Should I complain?
G**O
Excelente!
Lo uso con un reloj Huawei Watch GT 6 pro y funciona muy bien.
G**I
Rispetta tutte le promesse
ottimo sensore di cadenza e velocità: utilizzato su bike indoor e collegato in Bluetooth a visore Meta Quest rilevato perfettamente da app di bike fitness, abbastanza preciso anche nella misurazione della distanza percorsa comparando i dati dell'app sul Meta Quest con quelli del pannello della bike indoor. E' un articolo che ha un onesto rapporto prezzo qualità, facile da montare e con una batteria che dovrebbe durare tantissimo prima della sua sostituzione, naturalmente questo dipende da ... quanto si pedala.
A**Z
Perfecto
Funciona sin problema
M**J
działa OK
działa be zarzutu
B**I
De boa!
Funciona certinho, tanto em MTB ou Speed.
Trustpilot
3 weeks ago
3 days ago