Aero road helmets have been WorldTour trendy for a while, with most teams sporting an aero version of their standard road helmet. Aero road helmets from Giro,
Kask, Specialized, Bell, POC, even Lazer with their GladWrap covers are all seen in the peloton.
Googlering away for aero road helmet reviews, I found a lot of reviews based on looks, weight, price, yet not a lot of data. Some manufacturers published their own data to make the sell. I don't trust any "data" published by the same company trying to sell me something. I'm interested in the proof. Independent tests. The actual benefit of something being sold as a performance enhancer, or to use a term to better increase the SEO of this post, a marginal gain.
The
only true test would be a wind tunnel, an indoor velodrome,
or some funky iBike paired with a power meter. Without any of these, I
waited for a very calm day and ran a number of five minute power tests at
different speeds on an outdoor velodrome (Packer Park) and flat section
of road (Richmond Boulevard).
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| Yes I wrote the results down! Never trust technology, much. :) |
Equipment: Road bike (as pictured). Standard road wheels. Short sleeve onesie 'crit suit'. Quarq power meter (zeroed before each test). Garmin 800 head unit. No gloves. No shoe covers. Water bottle on the down tube.
Helmets: Specialized Prevail (M), Specialized Evade (M), Melbourne Bike Share (M), and Limar Crono (L). The Crono TT helmet was added to the mix to make sure my testing was working, it should score lowest on each test.
Method: 5 minute intervals maintaining a set speed. Static position on the bike (hands on hoods, slight bend in elbows, standard road position).
Tests 1&2: Velodrome. 38km/h and 43km/h.
Test 3: Road. 41km/h out and back. Pausing the data recording for the u-turn.
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| Click the image to load full size. |
Conclusions: For me, I'll keep wearing my Prevail for training, it'll be a harder workout. Is an Evade worth it? Yes compared to a Prevail. Absolutely not compared to a $5 Melbourne Bike Share helmet.
I really wasn't happy with the two velodrome tests. Even with next to no wind, my speed/cadence/power was oscillating every 10-15 seconds from the bends to the straights. The averaging takes care of this, however I don't think it was truly representative of real-world conditions.
Test 3 on the Richmond Boulevard produced some very interesting data, a massive 16W difference between the Evade and the $5 Melb Bike Share helmet at ~41km/h. This needs to be investigated more.
I really wasn't happy with the two velodrome tests. Even with next to no wind, my speed/cadence/power was oscillating every 10-15 seconds from the bends to the straights. The averaging takes care of this, however I don't think it was truly representative of real-world conditions.
Test 3 on the Richmond Boulevard produced some very interesting data, a massive 16W difference between the Evade and the $5 Melb Bike Share helmet at ~41km/h. This needs to be investigated more.
Further Testing: More road testing. More helmets. I definitely need more data on the Evade vs MBS battle. I'll use the Prevail as the control and not bother with the Crono. Round 2 will be very interesting.
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| Steele von Hoff - Winning national championships and hearts.... in his aero road helmet |
