Shit sorry wrong one this is correct one. But still way faster at 230W
Iona can be windy, and the winds can change throughout the day. I ride that segment a lot in the summer. Unless you can show those efforts are around the same time, it’s quite possible you’re not comparing apples to apples.
I’m not sure that Favero is any better than Garmin.
In general though, there is poor agreement between different power meters. You can have two of the exact same model power meters and have the readings be >30w off (based on personal experience).
It’s why there are settings to adjust/scale what they’re outputting, to make it easier to train on more than one bike at the same time.
Power is just for training and comparing to yourself. Real world results are for comparing to other people.
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I have not found that to be the case and looking at dcrainmaker’s extensive testing most known good power meters agree very closely.
I have compared several power meters (4iii, quarq, garmin rally, Assioma duo, Assioma pro mx, Shimano (
) and power2max. All of them are within a reasonable margin of error for me ~5w difference was the largest I experienced.
That is excluding the Shimano and 4iii mounted on Shimano cranks as those have well known issues.
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Different experience then. I’ve had 10 different PMs over the years now (multiple bikes) plus I think 3 Kickrs I’ve gone through, plus my wife’s trainer.
Most have been within 20w of each other, but there have been some very special ones.
This is three different Garmin Rally’s, three Stages, two Faveros and two 4i.
That is the verdict by the usual suspects: Favero power meter pedals are, according to them, the gold standard for pedal-based power meters and serve as a reference just like Quarq‘s power meters.
No product is perfect and you could get a lemon, though.
38 km/h at 230 W sounds reasonable if you don’t have any headwind.
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I’ve had four different PMs. Stages and 4iiii crank based PMs, a Power Tap hub and now Favero Assioma MX1 pedals.
The Faveros read the lowest of all the PMs. Not by a whole lot, but maybe 2-3% lower than either of the crank PMs and 5% lower than the Power Tap.
Regardless of what the power meter is reading. The OP needs to train if they want to get faster. Changing the PM will not make them faster even if it outputs a different number.
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Again, this is an apples and oranges comparison. You have two different riders at different times of the day on different bikes and different positions. You simply can’t make a direct comparison between them. Way too many variables.
And even if the data is valid, which one is correct? You are assuming the Garmin is correct because it gets you closer to the result you want….but that doesn’t mean it is accurate.
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going from road bike with a bulky jacket and pants to a TT bike in decent kit could literally add over 100W of drag. I’m honestly impressed you hit 35kph in clothes like that.