HLaB
Marie Attoinette Fan
I'm interested in some review of the Avio PM, its £250 and British made. http://cycling.avio.mobi/?page_id=2416
Affordable power meter
- Thread starter Milzy
- Start date
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Racing roadkill
Guru
https://www.evanscycles.com/stages-shimano-105-5800-g2-EV261153
I've used these, they are very good, and don't rape your bank account too much.
I've used these, they are very good, and don't rape your bank account too much.
Dogtrousers
Kilometre nibbler
That's not an answer. It should work equally well in a group, in a headwind, in still conditions. How well that is, I don't know.
It's an interesting conept that I've followed since the ibike incarnation. All power meters measure output indirectly, and use a model to estimate results, whether from strain gauges or the multiple factors this measures.
I'd consider one if I had any interest in my power output, but I don't. So I won't.
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S-Express
Guest
Drafting someone in a group is the issue, so it is not going to work well in a group situation, for that reason.
Dogtrousers
Kilometre nibbler
That's still no answer. Why should it be an issue? Genuine question. Airflow is reduced and power requirement is reduced commensurately.
Racing roadkill
Guru
It's not an issue. The power you produce ( cadence x torque ) can easily be kept constant, draught or no draught. The difference will be an increase in speed at the same power, with a draught.
Dogtrousers
Kilometre nibbler
I can see that group riding, or headwind riding would be an issue for a similar device that modelled power output from rolling resistance, incline and speed, but not airflow.
Not that it's of any real interest to me beyond idle curiosity.
Not that it's of any real interest to me beyond idle curiosity.
S-Express
Guest
Because the device relies on airflow to measure. If it isn't getting the airflow, it won't be measuring correctly.
Dogtrousers
Kilometre nibbler
You don't seem to have understood how it works.
U
User33236
Guest
I have one and use it across two bikes. Was a bit of a pain setting the two up but once done swap to and fro easily.
S-Express
Guest
There's very little not to understand. The device relies on changes in wind speed and air pressure to measure power - both of which will be affected if you are riding behind someone, or in a group.
Although if you aren't riding in a group, then it doesn't matter anyway.
U
User33236
Guest
I set mine up, temporarily, on my bike with a Stages PM and went for a group ride with my CC. Figures from both meters and head units were very very similar.
Dogtrousers
Kilometre nibbler
And, amazingly enough, the power requirement changes in these circumstances. So the measured airflow remains valid. Just as it would for a solo rider with a tailwind. Measuring changed airflow in changed circumstances and adjusting the estimated power accordingly is the whole point.
Whether it works will depend on the models they use, but there's no fundamental reason why it shouldn't.
S-Express
Guest
The measured airflow is corrupted by the rider in front. Basic physics dictates that it cannot remain valid for that simple reason.
