I think about the time trial helmet is the fastest, based on the measurements as a vindtundel tests show.
Some who know of such a test and could link to it.
No way to know for sure what’s fastest FOR YOU unless you test them yourself.
Pick the one you think looks the coolest… or get the Giro A2, it’s cheap and tests good on lots of people.
No way to know for sure what’s fastest FOR YOU unless you test them yourself.
Pick the one you think looks the coolest… or get the Giro A2, it’s cheap and tests good on lots of people.
Perfect response.
On the aggregate, the Giro A2. But this could be a terrible helmet for you without actually testing.
No way to know for sure what’s fastest FOR YOU unless you test them yourself.
Pick the one you think looks the coolest… or get the Giro A2, it’s cheap and tests good on lots of people.
This^^^^^
In our AeroCamp testing, we’ve never seen the A2 test bad on anyone. It may not be the fastest for that person, but it is usually in the top 2 or 3. Likewise the LG P-09 seems to be a safe choice.
Thanks
How many watts would you typically see between the ‘best’ on a person and the A2 ? 2-3 range or more ?
From what I’ve seen reading people’s wind tunnel reports etc it’s usually within 2-3 watts of the fastest option… I’d guess about 80% of the time. It’s certainly not as fickle as something like the Kask Bambino.
That said, the only way to know is to test. If you have a power meter, google “Chung Method Aero Field Testing”.
From what I’ve seen reading people’s wind tunnel reports etc it’s usually within 2-3 watts of the fastest option… I’d guess about 80% of the time. It’s certainly not as fickle as something like the Kask Bambino.
That said, the only way to know is to test. If you have a power meter, google “Chung Method Aero Field Testing”.
Or, “The Platypus Thread”.
Around that, yes.
The exception is when someone is really suited to the Kask Bambino. But that’s a helmet you really REALLY need to test for.
Around that, yes.
The exception is when someone is really suited to the Kask Bambino. But that’s a helmet you really REALLY need to test for.
Interesting you say that
Last year I tested a Bambino in a tunnel. It was considerably faster
This year, my LBS had one in stock with a 30day return policy.
So I took it a tried it. Up and down a relatively flat course, hold 165w, 185w, 205w and 225w in each direction
4x with the Bambino, 4x with the A2.
I could not see the difference.
In this case there was a tail/head wind.
Which brings up, how do you handle discrepancies between the tunnel and outdoor testing ?
On one hand the tunnel is much more precise. On the other, outdoor is real world.
ask Nick_Barkley
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Around that, yes.
The exception is when someone is really suited to the Kask Bambino. But that’s a helmet you really REALLY need to test for.
Interesting you say that
Last year I tested a Bambino in a tunnel. It was considerably faster
This year, my LBS had one in stock with a 30day return policy.
So I took it a tried it. Up and down a relatively flat course, hold 165w, 185w, 205w and 225w in each direction
4x with the Bambino, 4x with the A2.
I could not see the difference.
In this case there was a tail/head wind.
Which brings up, how do you handle discrepancies between the tunnel and outdoor testing ?
On one hand the tunnel is much more precise. On the other, outdoor is real world.
What is considerably faster? And is that compared to an A2. How long was the course? What was the time frame you tested in? How much did the wind change in between runs?
5 watts is a significant improvement, but that translates into around 20 seconds over 40k or 45 seconds over a HIM. If your course was 5k. That’s only 4 seconds. That would be easy to miss or get cancelled out depending on when you stopped the watch, or how you started each run.
If you test outdoors properly, there is really very little discrepancy between the measurements.
What is considerably faster? And is that compared to an A2.
In the tunnel, Bambino was about 75g faster than Selector which was about 50 faster than A2. For me
How long was the course? What was the time frame you tested in? How much did the wind change in between runs?
With A2, I was doing 4km one direction, 4km back at 165w. Then change helmets, repeat
Back to A2, 185w, 4km back and forth, change helmets…
This was to minimize the impact of wind changes
All runs we almost equal (all runs in the same direction that is)
You are right, at 4km runs, a 5w .5sec/km that is only 2 sec difference
However my aerolab cda was pretty even