Getting aero: beyond a good baseline what to try?

Anyone had hands on a Notio or similar device? I followed the development for a while then moved to other things and away from TTs.

The arrival on Jumbo Visma using a similar probe caught me eye.

I’m waiting for mine - decided that on balance I could get more watts from a Notio than a 2nd hand disc wheel. I’m hoping that it makes testing a bit easier, more reliable, and opens up some new test circuits.

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I’d be interested in hearing how you get on. Having had an eye on this market for a while (since the Newton), it’s been tough to develop a reliable meter.

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Been reading up as much as I can since ordering it, I’m really glad to have had the experience from doing Virtual Elevation / Chung method testing, as I think it helps to develop good protocols and testing techniques, which still count for a lot even with a device.

I’m slightly frustrated by the thought of the calibration protocol. 1.5k -3k flat (<2% grade), consistent wind, no corners traffic free course to do an out and back on. Calibration is needed every time the front end changes.

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Better set the alarm clock for a 3am start!

Can you get to a velodrome?

Soon… though we’ll have to see if there is any leeway with the bikes they’ll allow.

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Please do post your experiences - maybe create a thread just for that purpose? Am sure there will be a number of data and aero geeks interested in following along.

Good luck and fingers crossed!

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There are some discrepancies between Aero coach and Bike Rolling resistance in the data for tubes.

When I’ve done some testing on rollers I’ve not been massively convinced by the results. The curves I get are non linear, meaning at a higher speed there is either aero drag, and or bearing drag being introduced. I was testing up to 70kph though.

Bike Rolling Resistance however, use a standard wheel and slower speed on a test rig with checker plate rather than a smooth drum. I had a brief email exchange, and they run bearings without seals to try to minimise the drag.

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I tried super stacked hands yesterday - and sadly it wasn’t very fast for me, about 15W slower.

I think it 's probably due to a big gap between the extensions and my forearm - I could feel a lot of unstable air movement there during the test.

It’s good that you have some prior experience with aerotesting. Anecdotally, riders with prior experience have more realistic expectations about what they need to do in order to get good estimates. Some users were hoping for a device that would turn regular rides into wind tunnel tests. It’s more like, even without a sensor you can get good results with good experimental technique and pristine conditions; the sensor relieves you of the need for pristine conditions but it doesn’t relieve you of the requirement for good experimental technique.

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Still waiting for it to turn up…

But there really isn’t much good info from them available on good testing technique at the moment, which is disappointing. I’m hoping for something better in the box when it turns up. Otherwise I’ve had to use good to find various PDFs from their closed bike fitters site on technique and installation.

Well shoot, sorry to hear that! Yeah, when I stack my hands, I can feel the airflow go from turbulent into my torso to basically no detectable airflow. If there’s one thing that I learned from aero testing at ERO Sports, it’s that one-size-does-not-fit-all! I was surprised to learn that things like gloves, a single vs. double chainring, aero socks, and other things don’t necessarily decrease CdA meaningfully in all cases. Hopefully the consumer-available aero sensors will get good enough (and cheap enough!) that we can all do our own testing before too long… best of luck with your progress!