What are the best aero bike helmets? We tested 10 in a wind tunnel to find out

The popularity of aero road helmets has exploded in triathlon, sending the long-tailed TT helmet towards the margins as savvy triathletes have realised that aerodynamics, comfort and ventilation could come in one helmet package.

You’ll still see both on the race track, of course, so read on for our reviews of a range of top aero road helmets.

To help you find the fastest aero road helmet, we’ve tested all of these helmets below in a wind tunnel, which few publications do, to determine their aerodynamic efficiency.

Our expert bike tester Matt Baird rode at the equivalent of two different speeds, wearing each helmet. Wind tunnel staff recorded the drag produced and extrapolated the time it would take to complete a 40km/25mi time-trial relative to our control helmet.

On this page, you’ll also find our guide to what an aero road helmet actually is, and an overview of how we tested (in and out of the wind tunnel).

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Best aero helmets we’ve tested in a wind tunnel

1. Specialized S-Works Evade 3

The Evade 2 has scored well in our tests previously, and Specialized says that the Evade 3 has ‘maintained’ the aero performance of its predecessor, while increasing ventilation with nine vents.

Honestly, it strikes the sweetspot between speed and breathability superbly. On the downside, I’m not so keen on the Tri-Fix web strap system, which feels uncomfortable under the ears.

The helmet boasts a MIPS Air Node liner and scored a five-star rating by the Virginia Tech institute’s helmet lab. A weight of 9.7oz / 275g is about standard and it’s tidily finished.

In the wind tunnel it was 31.8secs faster over 40km / 25 miles at 30km/h / 19mph than our baseline Decathlon helmet and 10secs faster at 40km/h / 25mph. Both results put the Evade 3 in the top half of the 11 helmets we tested. Find out more in my full Specialized Evade 3 review.

2. HJC Furion 2.0

HJC’s Selfit retention system takes some getting used to, but I grew to like. The internal adjustment mechanism is decent, but I’d like to see more padding on the front for long-distance racing. There’s no MIPS or Virginia Tech rating, but there is an internal frame integrated into the EPS form for reinforcement.

In the wind tunnel the Furion 2.0 was the second fastest helmet we tested at 40km/h / 25mph. A weight of 7.62oz / 216g is class-leading. Read my full HJC Furion 2.0 review for our full verdict.

3. Giro Eclipse Spherical

Giro launched the aero road helmet movement in 2012 with the Air Attack, so any launch from the brand demands attention. So it is with the Eclipse Spherical. The Roc Loc 5 Air system’s internal fitting mechanism and slick retention dial swiftly secures an optimum fit, while the plush yet lean Ionic+ padding sits in the perfect place on the forehead for comfort and sweat mopping.

The Eclipse boasts 14 ventilation channels and breathability felt good. The 9.77oz / 277g weight is decent enough. It wasn’t among the best performers in our wind tunnel testing. But it’s still likely to have the edge over standard road helmets.

The Spherical tech integrates MIPS (Multi-directional Impact Protection System) very nicely and the outer shell blends into the EPS core for a classy look. Read my full Giro Eclipse Spherical review for more.

4. Scott Cadence Plus

A standout of the Cadence Plus are its Aero Plugs or winter bungs (an extra $16.60 / £12.99). You can shove these into the ventilation channels on colder days or if you’re seeking an aero advantage where heat isn’t a major consideration.

The Cadence Plus features an exceptional internal adjustment mechanism that was instantly secure and easy to adjust. Comfort is high thanks to some great padding and this sits atop of the MIPS Air Node system.

Against our baseline Decathlon helmet the Cadence Plus was a lot faster in the wind tunnel. Meanwhile, the helmet scored four stars in the Virginia Tech institute’s safety tests. It weighs 10oz / 284g, increasing to 13.69oz / 338g with the bungs in place, which is a little on the heavy side. See my full Scott Cadence Plus review for more detail.

5. Van Rysel Road Bike Helmet FCR

What a treat from Decathlon – an aero road helmet for less than £100. There’s plenty of tri appeal in the Road Bike Helmet FCR. For one, there’s a magnetic chin buckle, which is easy to use with chilly fingers. The aero performance was also reasonable for a helmet at this price point.

There’s no MIPS nor any rating from the Virginia Tech institute, but it does comply with European regulation EN1078. Ventilation is reasonable, while I was a fan of the slightly wider fit, too. A weight of 10.22oz / 290g isn’t ideal, but isn’t particularly noticeable while on the road.

Getting the right fit is easy enough and comfort is decent, too, making this a great value option. Find out more in my full Van Rysel Road Bike Helmet FCR review.

6. Met Manta MIPS

The Met Manta MIPS has a tri-friendly magnetic buckle, which is great for quick transitions. What’s not so great is the excess straps, which feel counterproductive given the efforts that’s gone into improving aerodynamics elsewhere. 

Safety is boosted by MIPS. It scored four stars in Virginia Tech institute testing, placing 83rd of out 284 road helmets for protection. The lid offers plenty of comfort and the rear cradle delivers a decent 3.5cm of vertical adjustability. The retention dial is easy to adjust on the go, too. 

Venting’s fine for an aero helmet and 8.85oz / 251g is very impressive. In the wind tunnel, the Manta MIPS outperformed our baseline Decathlon helmet by nine to 32 seconds. See my full Met Manta MIPS review for more.

7. Abus GameChanger 2.0

I found the original GameChanger too narrow and uncomfortable. Thankfully, the sequel is a step-up thanks to the slighter wider fit, albeit it’s still quite narrow so wide-headed cyclists beware.

It employs the MIPS Air Node safety system and received a four-star rating at the Virginia Tech institute for helmet safety. You can also buy a non-MIPS version for $267.99 / £225.

With a large array of forward-facing airflow channels, airflow is impressive for such an aero-focused helmet. The Fidlock magnetic buckle is great for triathletes, as it’s effortless and swift to connect or undo.

Weight is 10oz / 284g, while in the wind tunnel it was significantly faster than our baseline helmet. See my full Abus GameChanger 2.0 review for more.

8. Smith Ignite MIPS

The Smith Ignite MIPS has a lot going for it, including great safety features. The helmet uses Koroyd material inside the two main vents for impact protection and energy absorption, but it also keeps bugs out. You also get the MIPS brain protection system, which is great to see. Weight is 9.98oz / 283g in a size medium.

In the wind tunnel in May 2024, it was the second fastest aero road helmet out of 11 on test at 30km/h / 19mph, though it was seventh at 40km/h / 25mph. There are six vents on the front of the helmet, but these struggled when it came to airflow on hot days or hilly courses.

The padding proved comfortable, but getting the split straps to sit flush against my face wasn’t easy. For more detail see my full Smith Ignite MIPS review.

9. Oakley Aro7

The latest Oakley Aro7 offers broader appeal than its predecessor, which was time-trial-focussed. That’s good news, but the loss of the magnetic chinstrap isn’t, making it more of a faff. Finding an ideal fit is otherwise easy enough. There’s limited venting on offer here, while the wind tunnel performance was middling.

The Aro7 was only a couple of seconds faster than our baseline helmet in the wind tunnel. That said, in the interest of consistency, we tested the helmet with the same sunglasses as the other helmets were tested with, rather than with the helmet’s dedicated visor, which is likely to have improved performance here. Speaking of which, the included clear and tinted Prizm visors offer plenty of clarity and fit securely to the helmet.

A weight of 13oz / 370g (including visor) leaves a little to be desired, though. See my full Oakley Aro7 review for more.

10. Rudy Project Nytron

The wind-tunnel development of the Rudy Project Nytron is evident in the aero tail and 15 stealthy exhaust ports, the latter making this one of the most vented and versatile lids here for a variety of tri situations.In our independent wind tunnel testing, the Nytron placed third out of the 11 helmets at 40km/h / 25mph.

It’s one of the cheapest aero helmets around. But is still expensive, which makes the cheap plastic casing on the ratchet system an unwelcome surprise that’s already showing signs of wear.

The padding, straps and retention system are all unflashy but functional. MIPS is missing, but there’s Rudy Project’s WG11 rotational impact system. Weight is a decent 9.45oz / 268g. Read my full Rudy Project Nytron review for more.

Wind tunnel test results

Take a look at the table below to see a breakdown of which helmet was fastest over 40km / 25mi. The times are shown in seconds, with the testing conducted with a yaw angle of 7.5° and at two speeds, 30km/h / 19mph and 40km/h / 25mph.

Testing was done with the same rider in the same aerodynamic position on aerobars. Read more about how we tested further down this article.

Helmet	Time (secs) @ 30km/h / 19mph	Time (secs) @ at 40km/h / 25mph
Van Rysel Road Bike Helmet FCR	4799.99	3599.99
Oakley Aro7 (without visor)	-2.16	+4.34
Giro Eclipse Spherical	-11.44	-0.18
HJC Furion 2.0	-18.63	-19.44
Abus GameChanger 2.0	-27.30	-14.42
Rudy Project Nytron	-30.69	-15.27
Specialized Evade 3	-31.80	-10.01
Met Manta MIPS	-31.84	-9.17
Smith Ignite MIPS	-34.41	-9.14
Scott Cadence Plus (with bungs)	-53.78	-38.98

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We’re proud to say that we’re one of the only publications worldwide to regularly test our aero helmets in the wind tunnel.

The reason is that nearly every brand claims to produce the world’s fastest helmet, but still refuse to release the raw tunnel data from their own tests.

As our wind-tunnel results show, some helmets only perform at certain angles and speeds, so, while a helmet may technically be the fastest at a 20° yaw and riding at 55kmph / 34mph, that doesn’t mean it performs across a range of wind directions and riding speeds.

Given that the vast majority of a 180km / 112mi Ironman bike leg is spent riding below 10° yaw (98% at IM Arizona, 72% at Kona, for example), the 0°, 7.5° and 5° angles especially were the key focuses for us.

Wind tunnel testing

Our most recent wind tunnel testing took place at the Silverstone Sports Engineering Hub in May 2024 under the supervision of aero expert Stephen Roche (AKA, The Bike Tailor) and wind tunnel engineer Nick Richards.

This test was conducted with a yaw angle of 7.5°, which is often used as a real-life baseline, as it’s consistent with what you’ll find out on the road.

We used the same rider, tri-suit and sunglasses throughout the testing, and ensured the model kept the same position for each test by making use of the wind tunnel’s rider outline guides.

These allowed us to keep an eye on the rider and ensure he didn’t deviate from a consistent position on his tri-bars.

Power was kept consistent throughout testing at 150w, and we tested at both 30km/h / 18mph and 40km/h / 25mph, capturing 100 data points every second and recording each run over 30secs to get an average CdA.

Real-world testing

A key aspect in our testing criteria is ventilation. An aero road helmet should also provide better ventilation than a TT lid in summer racing and, as our year-round testing has proven, some protection from those beastly easterly winds in the winter.

Other key factors are the effectiveness of the retention system for comfort and fit; the ability of the buckle to be unclipped (especially with cold post-swim fingers); and the helmet’s often-overlooked modus operandi, safety.

All of the helmets here have passed the relevant European bike helmet safety tests, but also look out for added safety features such as the MIPS system. And if safety is your primary concern, bear in mind that the best budget bike helmets can be as safe as the priciest models.

Frequently asked questions

Aero helmets are just one way to go faster on the bike leg. If you don’t have a triathlon bike, have a look at the best aerobars as a way to speed up your road bike (where rules allow).

Meet our testers

Former 220 Triathlon staff writer Jack Sexty now edits road.cc, so it’s fair to say he knows his stuff about triathlon and cycling tech.

Rob Slade used to be content editor at 220 before moving to be deputy editor at Live for the Outdoors. Rob still dabbles in triathlon racing and continues to test cycling products. 

Triathlon author and experienced multisport racer Matt Baird used to be features editor at 220 before editing Cycling Plus and now BBC Countryfile Magazine.

Recent updates

• 27 October 2025: we gave more information about the testers of these aero helmets.
• 8 December 2025: we added two more ‘best for’ categories for versatility and TT helmets, and checked all the helmets were in stock.
• 24 January 2026: we refreshed our product links to find you the best possible deals on our aero helmet recommendations.
• 25 March 2026: we refined our product selection to 10, having checked they were all in stock.
• 5 May 2026: we reformated the tables to make them easier for you to compare helmets.