Reviews over the

4iiii Precision Ultegra R8000

I already have an Ultegra 6800 4iiii power meter. When this new version went on sale at a great price point, I pulled the trigger straight away. Simple installation, easy to use and consistent, accurate power readings. My only slight gripe is that the 4iiii App can only see one PM at a time, so need to keep deleting one or the other and run a new search, in order to carry out a Pre ride calibration.

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Has been accurate so fair. Timely delivery. No complaints.

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Very good for one side! The only thing that i notice is that the readings are very spiky

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Great value product easy to set up with Garmin head unit and was delivered very quickly when purchased.

Very pleased with this addition for my training bike. Quick delivery. Looks solid and good quality.

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4iii has made a very good power meter, easy to use and with reliable data. Mantel price offer is very good, so buy it you won't be disapointed.

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Excellent power meter simple to setup and works flawlessly highly recommend

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Easy to install and paired with Garmin and Zwift with ease.

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Mantel beat every other website I could find on price and the delivery was relatively quick. Not Amazon quick, but quick!

If you are into Gagets then this left crank power meter will suffice and give you good feedback during rides. One flaw is that is does not account with power meter variance between left and right crank if you use garmin product and just reads right side which is not ideal. I understand stages do not have this flaw but 4 iii looking for a solution

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Assembly on the bike and set up is easy, data recording is excellent and pre ride calibration is straightforward and swift. No issues to note as yet, been in use for several weeks without issue. Great for my training despite not being twin sided, as I do not find this to be a problem.

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