Crono and Triathlon Helmets

What is a time trial helmet and why does it make a difference

A time trial helmet is an aerodynamic helmet designed to reduce air resistance when riding in a tucked position. At high speeds, the head is one of the body parts that has the greatest impact on aerodynamics. The right helmet allows you to save watts, and therefore time, for the same effort.

For this reason, it is an item to consider after the bike, especially if you use a time trial or triathlon bike or a time trial frame. A standard road helmet remains the best choice for training rides and group races: you can find them in the Helmets category.

Time trial helmet vs. triathlon helmet: the differences

In common language, the two terms overlap and many models are suitable for both uses. The main differences are:

• Time trial helmet: maximum aerodynamics for short, intense races, often with more extreme shapes and reduced ventilation.
• Triathlon helmet: must function for hours, so it prioritizes ventilation, comfort, and heat management. It often has a visor or pairs well with glasses.

If you do both time trials and triathlons, choose a versatile model with good ventilation. If you only do short time trials, you can focus on maximum aerodynamic efficiency.

Long tail vs. short tail: which to choose

The long tail reduces turbulence behind the head, but it works best only if you keep your head still and aligned with your back. If you frequently lift your head to look at the road, the advantage is lost and the tail can become a limitation.

The short tail is more tolerant: it adapts better to head movements and less extreme positions. It is often the best choice for those new to time trials or with limited flexibility. If in doubt, evaluate your riding position and ask for advice from our team.

How to choose the right aero helmet

Aerodynamics and riding position

The best helmet is the one that works well with your position. A very low and extended position makes the most of a long tail. A higher position, or one where the head moves, requires a more tolerant helmet. If you are in the adjustment phase, go to the workshop. Position and components (handlebars and mounts, wheels) affect aerodynamics as much as the helmet does.

Integrated visor or glasses

The integrated visor protects the eyes, ensures a clean profile, and reduces turbulence. Some models come with a removable visor or in different versions. If you prefer to use your own cycling glasses, verify that they pair well with the helmet, without gaps or interference with the temples.

Ventilation and race use

The longer the race, the more ventilation matters. A very closed helmet is aerodynamically efficient but can become uncomfortable in the heat. Consider the race duration and typical temperatures: for an Ironman or a long triathlon, thermal comfort is as important as aerodynamics.

Weight, fit, and size

Weight, padding, and the adjustment system affect comfort. The helmet must fit well, without moving and without pressure points. As a general guideline, size depends on head circumference (measured above the eyebrows):

Each brand has its own measurements: always check the manufacturer's chart.

The best time trial and triathlon helmet brands

Kask time trial helmets

Kask is a very present Italian brand in professional cycling, with helmets designed with care for ventilation and comfort. Discover the Kask selection and the brand page.

MET time trial helmets

MET is another Italian brand, appreciated for its aerodynamic development and highly efficient lines. You can find everything in the MET selection and on the brand page.

Lazer time trial helmets

Lazer, a Belgian brand, offers aero helmets with particular attention to the balance between performance and ease of use.

Rudy Project triathlon helmets

Rudy Project, an Italian brand, is very present in the triathlon world. It is known for its attention to integrated visors and glasses, with solutions designed for long distances.

UCI certification and regulations for time trial helmets

A bicycle helmet must be certified: in Europe, the reference standard is EN 1078. A certified helmet guarantees a minimum level of protection, even if it is aerodynamic.

In official races, federation regulations (UCI, FCI) and, for triathlon, those of World Triathlon and the national federation also apply. Generally, modifications to the helmet (cuts, removal of parts) are prohibited, and the helmet must be worn with the chin strap fastened. Before an important race, check the updated regulations and the use of time trial helmets in various categories.

Why buy your time trial helmet from Cicli Mattio

We are bicycle specialists since 1996, with a shop and workshop in Piasco (CN). With us you get:

• Expert advice from cyclists, in-store or via chat and phone
• Free shipping in Italy over €99.99 (times and costs)
• Return within 14 working days (conditions)
• Secure payments and installments with Findomestic (payment methods)

To complete your race setup, also check the bodysuits, shoes, and active promotions.

Frequently asked questions about time trial and triathlon helmets

What is the difference between a time trial helmet and a triathlon helmet?
A time trial helmet focuses on maximum aerodynamics for short races. A triathlon helmet prioritizes comfort and ventilation for long races. Many models are suitable for both.

Long tail or short tail: which is better?
A long tail offers more aerodynamic advantage if you keep your head still and aligned. A short tail is more versatile and tolerant.

Can I use a time trial helmet for training?
Yes, but it has reduced ventilation and can be uncomfortable in the heat. For daily training, a road helmet is better.

Do I need a visor or are glasses enough?
It depends on preferences. A visor is aerodynamically cleaner. Glasses offer more flexibility, provided they pair well with the helmet.

How do I choose the size?
Measure the circumference of your head above the eyebrows and compare it with the brand's chart. If in doubt, contact us.

Are time trial helmets allowed in all races?
No, it depends on the race and category. Check the federation regulations before registering.