Reviews over the

4iiii Ultegra R8100 Precision 3+

Works perfectly, inexpensive single-sided power meter, FindmyPhone from Apple makes it a well-rounded product

Very easy to use and very accurate sensor for quality training. Shame about the battery, which discharges faster than expected.

Mounted like a regular rouble arm. Simple coupling and set-up. Affordable entry into strength / power measurement with great benefits for training control.

Been looking for a power meter for not too much money for a while. This one fully meets my expectations, does its job, reasonable battery consumption and easy assembly despite the lack of a good manual, but be careful, in my case there was a ring between the crank and the bearing, which I had not seen anywhere on internet videos. Fitted this in between and it ran like clockwork.

Pros & Cons

Works without problems, accurate data measurement

The star spanner for removing the crank must be ordered separately. The crank cannot be removed without it.

Perfect for performance training

I love the 4iii powermeter in connection with my Garmin Edge. Super easy to vonnect, easy to mount. Everything worked perfectly.

Pros & Cons

4iii makes high quality power meters at a great price. Thanks to the integrated Apple FindMy, I don't have to hide an AirTag on the bike so that a potential thief can easily find and remove it.

Easy installation and setup with the smartphone. The main reason for the 3+ version was the integration with Apple WoIst? or FindMy. The location of the bike can be shared with family members. I find this very practical in case something should happen or the bike goes missing. The power meter itself works flawlessly with my Garmin Edge device.

The Watt crank has now been tested for approx. 1000km, no failures. I'm also delighted that the crank was found immediately by my Garmin devices. I also think the Find my function is simply brilliant

Already a top product, but the addition of the AirTag apple feature is top-notch.