Dual ANT+ and Bluetooth is what keeps a sensor usable across head units · review
The best-selling sensor in this hub: one unit that switches between speed and cadence mode by reseating the battery, broadcasting on both ANT+ and Bluetooth.
Our conclusion Buy two. One in speed mode, one in cadence mode, and you have covered both for less than a tire.
The Magene S3+ is the sensor most people in this category buy, and the reason is that it is two products in one small housing.
Dual-mode operation showing and recording speed or cadence. Mode switching by reseating the battery. ANT+ and Bluetooth 4.0, compatible with devices supporting the ANT+ standard including Garmin, Bryton and iGPSPORT. Magnet-free mounting with an elastic double-sided band, no tools required. Magene also notes that old and new versions ship alternately, differing only in how the battery compartment opens.
A sensor speaking only Bluetooth pairs with a phone and can be completely invisible to a head unit that expects ANT+. Broadcasting both means the sensor survives your next computer, which is a longer horizon than the sensor’s own price suggests.
Older speed sensors needed a spoke magnet aligned to a fork-mounted pickup, which drifted out of alignment and stopped working. This mounts to the hub with a band and reads rotation directly. Nothing to align, nothing to knock.
Magene publishes the fact that two versions circulate, differing in the battery compartment. That is unusually candid and worth knowing if you buy a second one later and expect it to match.
A listing is not an offer: the reference exists on these stores, availability changes daily.
| Modes | Speed or cadence, switched by reseating the cell |
|---|---|
| Protocols | ANT+ and Bluetooth 4.0 |
| Mounting | Elastic band, no magnet required |
| Amazon reference | B08252X8VS (identical on 6 markets) |
| EAN | 8414775870867 |
Magene states you reseat the battery to switch modes. It is a deliberate design that lets one product serve both roles, and it means changing mode is not something you do mid-ride.
It broadcasts on ANT+ and Bluetooth 4.0, and Magene lists compatibility with devices supporting the ANT+ standard including Garmin, Bryton and iGPSPORT.
7.2/ 10
Buy two. One in speed mode, one in cadence mode, and you have covered both for less than a tire.
A first sensor, or a pair of them, at the price of a set of brake pads.
Amazon reports what buyers took in the month before this page was last checked: at least 600.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
Specifications: the manufacturer sheet for bike gear and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
Speed/cadence · Bluetooth and ANT+ · IP67 · app compatible
A dual-protocol speed and cadence sensor with a published IP67 rating and stated compatibility with Zwift, Rouvy, Ride with GPS, Peloton and Wahoo apps.
Best for: Indoor training, where named app compatibility and a sealed housing both earn their place.
Speed/cadence · Bluetooth and ANT+ · elastic band mount
A dual-protocol speed and cadence sensor at the same entry price as the Magene, mounting with an elastic double-sided band and no tools.
Best for: A second sensor to pair with the first, or a spare for a second bike.
Both sensors · ANT+ and Bluetooth 5.0 · on-board storage · hub mount
A bundle of both sensors, storing distance on board so rides record without a head unit present, over ANT+ and Bluetooth 5.0.
Best for: Garmin users who want both measurements, and anyone who wants rides logged without carrying a computer.
≈ $125
