Top 6 Best Aero Helmets for Triathlon

In triathlon, every second counts, and one of the most effective ways to shave off precious time is by investing in aerodynamic equipment. Aero helmets, specifically designed for triathlon races, are a critical piece of gear that can make a significant impact on performance. These helmets are engineered to reduce drag, allowing athletes to cut through the air more efficiently during the cycling portion of the race.

Selecting the right aero helmet involves considering factors such as the helmet’s shape, weight, ventilation, and comfort. The shape should complement the rider’s position and riding style to maximize aerodynamic gains, while the weight should be balanced against the helmet’s structural integrity and comfort for long distances. Adequate ventilation is essential to keep the athlete cool and performing at their peak, even under the intense sun.

When choosing an aero helmet, it’s crucial to think about the fit. A properly fitting helmet not only offers better protection in the event of a crash but also ensures that the aerodynamic benefits are fully realized. Additionally, riders should look for safety features such as MIPS (Multi-directional Impact Protection System) technology, which helps protect the brain from rotational forces during an impact.

We’ve spent numerous hours examining the latest aero helmets, considering their aerodynamic properties, comfort, ventilation, and safety features to determine which models stand out. With our thorough approach, we aim to guide you to the aero helmet that best suits your needs, ensuring you’re well-equipped for your next triathlon challenge.


Best Aero Helmets for Triathletes

In our search for speed and efficiency, we recognize the critical role that equipment plays in triathlon performance. We’ve curated a selection of the best aero helmets that promise to slice through the wind and shave precious seconds off your time. From advanced aerodynamics to optimal ventilation and comfort, these helmets are designed to help you perform at your peak while ensuring safety throughout your race.


SLS3 Aero Helmet

SLS3 Triathlon Helmet

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We think this helmet strikes a balance between aerodynamics and comfort, making it a solid option for triathletes looking for a performance edge.


  • Magnetized visor offers UV protection and easy one-handed operation.
  • Exceptionally lightweight, enhancing comfort on long rides.
  • Effective ventilation system helps maintain coolness during intense efforts.


  • One-size-fits-all can be restrictive for those with larger head sizes.
  • Limited head coverage might compromise protection for some.
  • While aerodynamic, lacks some advanced features of higher-end models.

Slipping on the SLS3 Aero Helmet, the first thing we notice is its surprising lightness. It certainly doesn’t add any strain to our neck muscles, which is a perk during longer cycling legs. The slim profile also helps minimize drag, an advantage we feel every time we get into our aerodynamic position.

The magnetic visor is a breeze to handle—even when we’re pounding the pedals and can only spare a single hand. The UV protection is a huge bonus too, keeping our eyes shielded from the harsh sun. Plus, it’s always a boon not having to fiddle with separate eyewear during transitions.

Airflow hasn’t been an issue with the SLS3; the ventilation curbs the build-up of sweat, keeping us reasonably dry and focused on our performance. Despite the good airflow, we note that it doesn’t quite match the breeziness of a traditional road helmet—but that’s the trade-off for better aerodynamics.

Nevertheless, we’ve noticed the one-size specification can be a deal-breaker for athletes with larger measurements. Those of us with bigger heads find the fit a bit too snug for comfort. And while the helmet’s reduced coverage makes it lighter, some of us worry it might not offer the same level of protection as a full-coverage option in the event of a tumble.

Overall, our team finds that the SLS3 Aero Helmet serves as a competent entry-level option for triathletes. It lacks some high-end features but makes up for it in weight savings and ease of use. It’s not the ultimate aero helmet, but for its price point, it’s a contender well worth considering for your next race.


BELL Z20 Aero

BELL Z20 Aero Helmet

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We believe the BELL Z20 Aero Helmet is a solid choice for any triathlete seeking an optimal blend of safety and speed-enhancement features.


  • Enhanced safety with MIPS technology
  • Superior comfort and adjustable fit options
  • Moisture-wicking padding to keep vision clear


  • May appear bulky on the head
  • Premium price point
  • Limited ventilation compared to non-aero models

Riding with the BELL Z20 Aero Helmet, we noticed immediately how the Fusion In-Molding Polycarbonate Shell gave us a secure, snug feel without the heaviness one might expect. The helmet’s aero-optimized shape sliced through the air with less resistance, which definitely contributed to a few seconds saved on our splits.

The Float Fit Race system combined with MIPS not only elevated our comfort levels but also provided peace of mind. On long rides, we found the MIPS technology to be unnoticeable in terms of feel, yet reassuring in its promise of added protection.

Despite the helmet’s focus on safety and aerodynamics, we were pleasantly surprised by the X-Static and XT2 padding. It pulled sweat away efficiently, which is crucial during a high-intensity segment or on warmer days.

The helmet did come across as slightly bulkier than some of the other streamlined models we’ve tested, potentially impacting its visual appeal to some. However, when it came to performance, the BELL Z20 Aero never disappointed us. Although it’s at a higher price point, our experience suggests it’s a worthwhile investment for the serious athlete who values tech advancements. Additionally, while its ventilation is satisfactory, there’s a compromise due to the aero design that some might find less conducive to cooling.

In a nutshell, if you’re looking to shave off time while staying comfortable and protected, the BELL Z20 Aero MIPS helmet stands out as a top performer. It’s a testament to BELL’s commitment to safety without overlooking the needs of a competitive triathlete.


Kask Utopia Helmet

Kask Utopia Helmet

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This Kask Utopia helmet marries aerodynamics with comfort, making it a top choice for triathletes.


  • Supreme aerodynamic design cuts through the air.
  • Offers admirable ventilation for cooling.
  • Lightweight construction provides comfort during longer rides.


  • Premium price tag reflects its high-end build.
  • Size options may not cover all head shapes perfectly.
  • High-speed design might be overkill for casual riders.

Slipping on the Kask Utopia, we immediately feel how it gives us an edge in slicing through the wind. The helmet’s aerodynamic profile is evident even as we commence our ride, promising those precious seconds saved during a competitive triathlon.

During our sessions, we notice the impressive ventilation system at work. Despite the helmet’s focus on speed, there is no compromise on cooling. Our head stays remarkably fresh, allowing us to concentrate on our performance rather than discomfort caused by overheating.

The Utopia’s lightweight feel is a boon for endurance. We barely notice it’s there, which is crucial during the bike leg of a triathlon where every ounce counts. The snug fit, adjustable features, and lightweight design combine to make us feel as though the helmet is an extension of ourselves, responding in harmony with our movements.

However, it’s clear this level of craftsmanship comes at a higher price point. For those devoted to shaving off time and seeking the pinnacle of performance, the investment can be justified. Yet for the everyday enthusiast, the sophisticated features of the Kask Utopia may extend beyond their practical needs. Choosing this helmet also means committing to finding the right size, as the perfect fit is key to benefiting from all the performance features – and with a streamlined size range, not everyone might find their match.

In summary, as we roll to a stop, the Kask Utopia leaves us feeling cool and swift, a testament to its design intention. It’s a serious helmet for serious competitors.


Giro Aerohead MIPS

Giro Aerohead MIPS Cycling Helmet Black/Titanium Medium

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We believe this helmet strikes an excellent balance for triathletes and time-trialists, offering a commanding mix of speed and cooling.


  • Featherlight construction and a snug fit barely let you notice it’s there during a ride
  • Magnetic visor attachment simplifies use and transitions, maintaining clear visibility
  • MIPS technology enhances safety, a reassuring feature during high-speed endeavors


  • Premium investment, but the advanced technology and features justify the price
  • Magnets, while convenient, require careful handling to maintain functionality
  • Visor may fog up in certain conditions, although it generally provides clear sight

The moment we donned the Giro Aerohead MIPS, its super-light feel and stable fit impressed us immediately. On a sprint, we valued its aerodynamic edge, cutting through the air with noticeable efficiency. The cooling effect, thanks to its Wind Tunnel ventilation, was a godsend during our most intense segments.

We’ve experienced the convenience of the magnetic visor firsthand; the transition from on to off is seamless. This feature also aids in swift transitions between disciplines, saving precious seconds in competition. Additionally, the shield offers wide, unobstructed views which is critical for safety and comfort.

Lastly, the MIPS technology is not just a buzzword; it’s a tangible layer of protection. During a particularly brisk ride, knowing we have that extra defense against rotational impacts gives us peace of mind, allowing us to focus solely on performance. It’s clear Giro has prioritized both safety and speed with this helmet.


LAZER Tardiz 2 Helmet

LAZER Tardiz 2 Triathalon Bike Helmet Matte White Large

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We’d recommend the LAZER Tardiz 2 for any triathlete looking to shave off seconds with a helmet that’s as swift as it is comfortable.


  • Snug, customizable fit mitigates pressure points
  • Efficient ventilation system, with added water vent feature
  • Aerodynamics are enhanced by the teardrop shape


  • Limited style options
  • May not fit as well for those with non-standard head shapes
  • Premium price point might be a stretch for some budgets

Straight out of the box, the LAZER Tardiz 2 feels like it means business. The matte white finish of the Large we tested not only looks professional but also keeps a low profile thanks to its teardrop design, aiming to slice through the wind effortlessly. We noticed right away how the dimpled tail section helps in that aspect – it’s not just a design element, it’s engineered to reduce drag.

Upon first wear, what stood out was the helmet’s comfort level. The retention system LAZER boasts about isn’t just marketing talk; it cradled our heads with an almost bespoke fit, indicating long-course triathletes won’t be distracted by discomfort. The absence of pressure points even after hours of use highlights the thoughtful design behind this gear.

Switching between the closed and vented cap depending on our ventilation needs was a breeze. The helmet is cool, literally, thanks to the airflow system, but the novel feature is the ability to squirt water directly onto our heads for those sweltering race conditions – a real game-changer during summer races.

Given its premium qualities, the LAZER Tardiz 2 sits at a higher price point, which might not be ideal for every triathlete’s budget. While certainly a high-performance piece, cyclists with uniquely shaped heads or who prefer a more flamboyant look might have to consider other options. However, for those who can invest, it’s a solid choice that delivers on the promise of speed and comfort.


Smith Ignite MIPS

Smith Ignite MIPS Helmet

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We find this helmet to be a top choice for triathletes seeking an aerodynamic design with exceptional safety features.


  • Superior protection with MIPS technology and Koroyd coverage
  • Customizable fit with VaporFit system
  • Optimal eyewear integration and clear vision with AirEvac


  • Premium price may not suit all budgets
  • Limited venting compared to other models
  • Eyewear integration primarily tailored for Smith products

When we took the Smith Ignite MIPS out for a spin, the first thing we noticed was how secure and comfortable it felt. The VaporFit adjustment system made it simple to get a snug fit that stayed in place throughout our ride. This attention to fit detail seems crucial for long-distance events like a triathlon, where discomfort can be a major distraction.

We were impressed by the integrated Koroyd technology; the helmet didn’t just look sleek—it provided a confidence boost knowing that our heads were surrounded by advanced impact protection. The airflow within the helmet was sufficient to keep us cool, although in comparison to some other models, these eight vents could leave the most heat-prone athletes wanting more.

Perhaps our favorite feature was the AirEvac ventilation system, which kept our Smith performance eyewear fog-free. Visibility is paramount, and not having to worry about fogging was a relief, especially during rapid transitions. This does mean, however, that those who use different eyewear brands might not experience the same level of integration.

Overall, the Smith Ignite MIPS helmet stands out in the crowd. Its blend of safety, comfort, and aerodynamics makes it a formidable choice for any serious triathlete. Despite a few trade-offs, the benefits clearly gear you for a performance that’s as safe as it is efficient.


Buying Guide

When looking for the best aero helmet for triathlon, we need to consider several key features that will affect our performance and comfort. Let’s break down what we should look for.


Fit and Comfort

The helmet’s fit is paramount. We should look for a helmet that comes with adjustable straps and retention systems to ensure a snug, yet comfortable fit. Also, adequate padding is essential for prolonged comfort during the race.



A smooth, teardrop-shaped helmet can help reduce wind resistance. We should focus on helmets with a streamlined design to improve our aerodynamics on the bike.



Proper ventilation is crucial to keep us cool and comfortable. We should consider helmets with sufficient air channels that promote airflow, balancing aerodynamics with breathability.



A lighter helmet can reduce neck strain over long distances. We should aim for a helmet that offers the necessary features while keeping weight to a minimum.


Safety Features

Safety is non-negotiable. We should ensure the helmet meets the safety standards and includes features like MIPS or equivalent technologies to reduce rotational forces on impact.



Being visible to others is important. We should consider helmets with bright colors or reflective elements.

Feature Importance Notes
Fit High Adjustable straps, retention system, adequate padding
Aerodynamics High Streamlined shape, minimal drag
Ventilation Moderate Balance with aerodynamics
Weight Moderate Lighter is preferable
Safety High Compliance with standards, anti-rotational features
Visibility Moderate Bright colors, reflective elements

In the end, we need to prioritize fit, aerodynamics, and safety while balancing weight, ventilation, and visibility to choose the best aero helmet for our triathlon needs.

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