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Wind tunnel tested: Which aero road bike helmets are the fastest?

Inside the Silverstone wind tunnel helmet test
(Image credit: Josh Croxton)

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(Image credit: Future)

When buying a road bike helmet, your primary motivation most likely relates to safety. In the event of a crash, the added protection offered by a certified helmet can be the difference between walking away with little more than your ego bruised and, well, not walking away at all. 

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HelmetCdA averagePower at 40km/hSpeed at 250w (km/h)40km TT at 250w
1. POC Procen Air w/Visor0.3501288.1538.1501:02:55
2. Specialized S-Works Evade III0.3523289.9638.0701:03:02
3. POC Procen Air w/out Visor0.3529290.4538.0501:03:05
4. Scott Cadence0.3531290.6238.0401:03:05
5. Van Rysel FCR 0.3531290.6238.0401:03:05
6. Giro Eclipse0.3541291.4438.0101:03:09
7. Trek Ballista0.3542291.5238.0001:03:09
8. Trek Velocis0.3549292.1037.9801:03:12
9. Julbo Sprint0.356293.0037.9401:03:16
10. Kask Utopia Y0.3563293.2537.9301:03:17
11. Lazer Vento Kineticore0.3564293.3337.9201:03:17
12. MET Manta0.357293.8337.9001:03:19
13. Smith Ignite0.3572293.9937.9001:03:20
14. Sweet Protection Tucker 2Vi0.3573294.0737.8901:03:20
15. Kask Elemento0.3574294.1637.8901:03:21
16. Limar Air Atlas0.3577294.4037.8801:03:22
17. ABUS Gamechanger 2.00.3581294.7337.8601:03:23
18. Oakley ARO7 w/out Visor0.3586295.1437.8501:03:25
19. Carnac Evo0.3588295.3137.8401:03:26
20. Specialized S-Works Prevail III0.3588295.3137.8401:03:26
21. Rudy Project Nytron0.3589295.3937.8401:03:26
22. Oakley ARO7 w/Visor0.3607296.8737.7701:03:32
23. Uvex Rise Pro0.3621298.0237.7201:03:37
24. POC Ventral Tempus0.3624298.2737.7101:03:38
25. POC Ventral0.3656300.9137.6001:03:49

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Josh Croxton
Associate Editor (Tech)

Josh is Associate Editor of Cyclingnews – leading our content on the best bikes, kit and the latest breaking tech stories from the pro peloton. He has been with us since the summer of 2019 and throughout that time he's covered everything from buyer's guides and deals to the latest tech news and reviews. 

On the bike, Josh has been riding and racing for over 15 years. He started out racing cross country in his teens back when 26-inch wheels and triple chainsets were still mainstream, but he found favour in road racing in his early 20s, racing at a local and national level for Somerset-based Team Tor 2000. These days he rides indoors for convenience and fitness, and outdoors for fun on road, gravel, 'cross and cross-country bikes, the latter usually with his two dogs in tow.