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New low cost, easy to move power meter
 

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Brian Nystrom
Joined: 26 Jan 2004
Posts: 4355
Location: Nashua, NH

4/25/19 2:01 PM

New low cost, easy to move power meter

If this actually works, it could be a game-changer:
https://bikerumor.com/2019/04/23/arofly-link-pre-order-most-affordable-power-meter-now-for-under-200/

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dan emery
Joined: 11 Jan 2004
Posts: 6187
Location: Maine

4/25/19 4:11 PM

Well maybe

Seems like a lot of things have to go right in the olí Algorithm....

But I know nothing about this stuff, and thatís OK since my present riding level does not justify worrying about power.

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Sparky
Joined: 08 Dec 2003
Posts: 17203
Location: Portland, OR

4/25/19 4:12 PM

Seems like something that will be snatched off bikes easily once the scumbags figure out it is worth something...

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henoch
Joined: 12 Jan 2004
Posts: 1623

4/25/19 8:11 PM

Until I see some real life tests it seems like a fantasy to me

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Brian Nystrom
Joined: 26 Jan 2004
Posts: 4355
Location: Nashua, NH

4/26/19 8:24 AM

I'm skeptical, too. I don't see how it can fully compensate for pressure changes caused by rough surfaces. If they can demonstrate that it's within 1-2% of other power meters on cobbles, it will get my attention.

Dan, I hear you. I can't justify the cost of a power meter, either, though I have to admit that seeing power readings on my smart trainer has peaked my interest somewhat. I'm sure my numbers on the road will be somewhere between embarrassing and pathetic, but it would be interesting to see how they change throughout the year.

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walter
Joined: 11 Jan 2004
Posts: 4371
Location: metro-motown-area

4/26/19 8:55 AM


quote:
Until I see some real life tests it seems like a fantasy to me


i'm with henoch and the peanut-gallery!

remember polar's failed powermeter that worked by indirectly inferring tension in a moving chain with varying chainline?

Last edited by walter on 4/26/19 8:56 AM; edited 1 time in total

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KerryIrons
Joined: 12 Jan 2004
Posts: 2985
Location: Midland, MI

4/26/19 8:55 AM

Casing stiffness

Given the significant effect that casing stiffness has on rolling resistance, I wonder how they take that into account in their algorithm? Seems like a coarse approximation at best. And if you look at the differences in road surface roughness, there could be a LOT of noise to filter out of the signal. Measuring power is a data exercise, and I'd need to see a lot of data to prove that this is any more accurate than the very poor estimates you get from a bike computer.

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