Quoting a useful comment on the road.cc review:
Quote:
Air pressure in tyres is a red herring. It doesn't measure tyre pressure. The only reason that it attaches to the inner tube stem is so that people think something magical is happening.
The unit will work equally well or more accurately equally terribly if you selotaped it to a spoke.
The unit contains an an air pressure sensor that measures atmopsheric pressure rather than tyre pressure. It also contains an accelerometer to detect wheel rotations. The device gives a power estimate by calculating your forward speed and acceleration combined with climb rate. It then uses an arbitary value for your cda and crr combined with your mass to come up with a power figure. At best it will give a result similar to strava estimated power algorithm.
The schematics are here -
https://fccid.io/2AJGD-AROFLY01/Sche...matics-3197365 (link is external)
It will never produce anything better than you get direct from strava.
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