CYCPLUS Cycling Speed and Cadence Sensor Bluetooth & ANT+ Wireless Bike Cadence Sensor Speed IP67 Waterproof

Easy installation and simple pairing with Cycplus m1.

Económico y fiable.

Great for measuring bicycle speed. It's accurate and connects quickly

Collegato al T-rex amazfit ed è perfettamente compatibile. Leggerezza e versatilità ne fanno un portento

I bought a pair of these to try to convert my Merach under desk bicycle into something that would play nice with tracking reasonable data for indoor bike activity via my Garmin ForeRunner 965. Both of the Cyclus sensors connected without issue to the watch via ANT, with a pedal icon for the cadence setting, and a speedometer icon for speed setting. Accessing the battery compartment is a bit strange, as instead of twisting the back panel in a full circle, you just set the dial to directly between the two possible settings, then gently pull it open. These ship with a plastic sheet between the battery and the connectors, which needs to be removed before they'll boot up. These were a tight fit on the cranks, and I could just barely slide them into place on the inner side, as long as I didn't add either of the rubber pads. They stay in place just fine without them, however. As my picture shows, the fit was tight enough that I got some white circles on the inner plastic cover while using them from some light friction. Unfortunately, in this position, I can't see the light indicators for their remaining battery life, but I'm glad there was a way to make them attach! Perhaps unsurprisingly, installing only the cadence to the crank had no impact on the watch's speed or distance calculations during a test cycle session. Lacking access to any wheel hub, I wondered if it would be possible to get acceptable readings by getting creative with the calibration and attaching the speedometer to the other crank, similar to how it installs for cadence. And as it turns out...yes! Repeatedly manually adjusting the "wheel size" calibration for the speed via my watch, I kept doing brief test runs and comparing the speeds to the built in LCD panel on my bicycle and my watch readings to calibrate and dial things in. With a manually set wheel size of 43 43 mm, it was pretty consistently within a 0.1 to 0.3 mph margin of error during glance comparisons at the speed gauges when pedaling with a consistent speed in my usual pedaling speed ranges, which is anywhere from 9mph to 16mph. After making sure to clear data stored on the bicycle so both were starting at a distance of 0, after a longer cycling session of about 1 hour and 30 minutes, the built in panel on my bicycle read a distance of 15.6 miles, and the final distance report from the Cyclus sensors to my watch was 15.3 miles. So extremely close! When initially writing my review, I thought the final distance gap was larger after another extended ride, but that was user error in setting up my comparisons, so I re-did my test to get a more accurate comparison. So, I feel pretty confident in the manual calibration of 43 43 mm as a starting point to calibrate the accelerometer, if installing both the cadence and speed to an under-desk bicycle via the cranks, even though that isn't the recommended install method. The tension control on my bicycle was set to the highest setting (8), if that matters at all in any of these calculations. While I am using them in a somewhat unconventional manner, these Cyclus sensors were still a nice upgrade to the functionality of my Merach bicycle, and I'm quite happy with them!