Somehow my Giro Aerohead didn’t come back home in my bike box from my last tri. The Mistral looks like a great choice. Thanks for this vid. I found your channel when researching calf sleeves. Great stuff!!

did you try stuffing bottles down their backs?

Great video. Interested to hear more about having a higher position can help lower the head.

Do you have numbers for hair vs no hair? I saw the short an saw the aero censor was installed.

over what distance?

Thank you, guys, so interesting! I'd like to say that I tried aZengear Claf Sleeves and for now, this is the best finding for my travels!❤

Hi Jim, long-time lurker here. Have you tested any of the new POC (Procen, Procen Air) helmets recently? I've been seeing EF race with one of their helmets in several road races this season.

Awesome content on such a hard to find topic, as I've been considering buying one of these. Thank you!

Curious if cadence variations, lower leg length, and diameter of calf impacts results?

good you suggest PM being off; did you supply a true dual pm ie dual cranks or dual pedals; these are the only two pms i would accept as a true reading; spider type pms in my exp are off

Surprised you didn't test Compressport, and Compressport Aero!!!

Do “regular” compression sleeves provide any aero benefit or do any aero sleeves provide any compression benefits in triathlon? I have venous insufficiency in one leg and compression socks are beneficial, but it seems that aero sleeves are pointless for compression. Are there any that do both?!

Hey great video!! Lots of detail. I appreciate all the work you put into this production

Wow, this was done very very carefully. Brilliant.

Great vid! Did you ever do any stubble vs clean testing??

I was curious how the Evade 3 compares to the Evade 2, but after seeing these results I doubt that the Evade 3 is much faster. Now I'm considering getting a full aero helmet after seeing these results 😅

I've always wondered how this applies to helmets. There were a few TT helmets released over the years with dimples on the leading surface, but they've fallen out of popularity. What's the background/reasoning/efficacy behind dimples on helmets?

Amazing info, thank you for that. Love it.

Curious if you could test the double bottle BTS as seen at 0:22 as well? If that's a similar 6W + 6W in the front at Skipper speeds it could get up to the 23W they mentioned.

What kind of repeats are you running across this spread? How many and how long are efforts? A/B/C then A/B/C? Looking at the body movement, vibrations in your sensor, and environmental changes (i saw at least 1 video with other trail goers riding ahead of the test subject), i'd be worried about your testing spread and respective accuracy/precision.

Love your content. Taking a step back from an unbiased position, it is safe for me to say (despite not knowing the test's margin of error) that basically any of these three helmets are "just about the same" for all tested athletes?

In triathlon, the visor steaming up from wet hair can be a problem. Also, if it’s a hot day ventilation and cooling might be more important than aero.

some of these guys have great positions; im surprised they are getting such high cda values are you calculating these figures from power data or are they measured with something like a nito ?

Prefer the aerohead 2

Absolutely love your work. Keep it up!

Really looking forward to the Aerohead 2. It looks like the design might represent something close to “peak aero” for TT helmets, yet the race results have only been so so. Could this mean that the current top TT helmets, like the Kask, are getting close to about as good as it gets and there are only something like 5 watts to be gained by really blending the helmet into the shoulders and optimizing the leading edge?

This is why independent testing is so important. No clear choice but some strong indications and lots of things to think about. Definitely helps point me in the correct direction.

Thanks as always Jim. What is your take on the HJC adwatt from your testing / testing you’ve seen?

Do you have any plans on testing the Giro Aerohead? Would love to know the results of this helmet in the three different head positions

I really appreciate that you also tested riders at different watt averages for those of us that aren’t WT riders 😀

Intriguing how the Kask Mistral seems to work for different riders. I will take it into consideration on my shopping list . Great content BTW - you have deserved more viewers and subscribers!

Makes sense the giant TT5 is good for a low head position. Push the air around the body. Higher head, you need a more aero headform. Seems the Kask is super aero for more people and head positions.

Remco has a shorter visor version. Possibly for the same reason your athlete was having issuses with it hitting his firearms in his regular position. Either way, for Remco, the shorter visor is the faster version than the one in this video.

Impressive! - what about new poc, flat aero??

Great script and overall production on that intro!

I do love the comparison videos you are doing - they are super - thanks

THanks for sharing!! I've got something i'd love to know. Height of a between the arm bottle. People are running them up to 100+mm height. 70mm i get, because of not having the bottle directly between your arms for comfort, but this seems like an aero advantage the higher it gets.

It has to be hot on your head

Any plans to look at the POC Procen?

Unbiased, thorough review as usual. Still cannot believe this channel is under 4K subscribers. Keep up the good work!!!!!!! In regards to the last tester not being able to get his head low enough see that Remco was running the TT5 with a trimmed visor.

Outstanding review, thanks for the objective assessment

Sell them and get a set of Hed, Swissside, DT Swiss, etc.

The Kask looks like the RP Wing without venting. I will stick with the RP Wing. Super comfortable, lightweight, and aero enough. Also, making power is easier in a higher position over longer distance, and running off the bike is easier when using a higher position.

What about the poc tempo? Alex rated it

Is there are any test result of the aero road helmet?

Trip strip the frame, and put dimples on the rear disc.

5 foot that explains it

Unbelievably! Thank you.

180 cm is 5'11", great video

How about a longer reach?