Reviews over the

4iiii RX810 GRX NDS Precision 3

Since I am used to continuous power measurement through training on the Smart-Trainer and orientate myself on it during training, I also wanted a possibility on my gravel bike. To be honest, pedal systems were too expensive for me and I ride for fun and pleasure - however, I find a control over the power quite charming especially on long bike-packing tours with >100km / day, in order not to be completely exhausted at the end of the day and to better manage the forces.... this seems to work reliably with the system from 4iiii and thus I am more than satisfied with the choice of measurement so far. More than sufficient for me and my needs...the serious amateur athlete or professional will certainly have to resort to double-sided measurement.

Since I am used to continuous power measurement through training on the Smart-Trainer and orientate myself on it during training, I also wanted a possibility on my gravel bike. To be honest, pedal systems were too expensive for me and I ride for fun and pleasure - however, I find a control over the power quite charming especially on long bike-packing tours with >100km / day, in order not to be completely exhausted at the end of the day and to better manage the forces.... this seems to work reliably with the system from 4iiii and thus I am more than satisfied with the choice of measurement so far. More than sufficient for me and my needs...the serious amateur athlete or professional will certainly have to resort to double-sided measurement.

I am very satisfied with the powermeter. For my Gravel (which sometimes has to be left outside at work) I was looking for a power meter that is permanently installed on the bike. Normally I prefer pedal-based systems. 4iiii is the top manufacturer for me and I am very satisfied.

Nice design, no difference from the Shimano GRX crank that was replaced. Easy to mount, you do need a crank wrench (Shimano Crank Wrench Hollowtech TL-FC16 FC-M960) to loosen the crank. If you don't have one, don't forget to order it. According to the instruction film, you can remove your pedal from the crank after you remove the crank from the bike. In my experience, it's better to take your pedal off first and then the crank. The meter is easy to pair with the Garmin Edge as well as the 4iii app. Once connected, don't forget to calibrate briefly and then you are good to go. After using it a few times I am very excited about training on power with this powermeter!

Pros & Cons