What is a convertible modular helmet and how does the 180° chin guard work

If you love the freedom of a jet helmet but don't want to give up the protection of a full-face helmet, the convertible modular helmet is probably the travel companion for you. Unlike "classic" modular helmets, where the chin guard lifts by 90° while still remaining anchored to the shell, 180° opening convertibles allow you to completely flip the chin guard behind the neck, transforming the helmet into a true jet helmet in every respect. The result is a single helmet that covers two needs: maximum protection on the highway or track with the chin guard down, comfort and unobstructed vision in the city or during stops with the chin guard flipped back.

This type has been hugely successful thanks to brands like LS2, which with the Advant range has made this solution accessible to an increasingly wide audience of motorcyclists, from commuters to long-distance travelers.

Pros and cons of convertible helmets

The advantages

• Total versatility: a single helmet for daily riding, touring, and coffee stops without having to remove it completely.
• Dual P/J certification: the most modern models are certified both as full-face (P) and as jet (J), so you can legally ride with the chin guard flipped back.
• City comfort: in traffic, at traffic lights or during breaks, being able to fully open the chin guard improves ventilation and communication, for example when you need to talk to a toll booth attendant or order at a bar.
• Practicality with eyeglasses: putting on and taking off the helmet becomes much easier compared to a traditional full-face helmet.

The disadvantages

• Greater weight: the chin guard rotation mechanism and the double anchor points add grams compared to a pure full-face helmet made of the same material.
• More mechanics: more moving components mean, in theory, a few more points to check over time (hinges, release button, seals).
• Aerodynamics and noise: although significantly improved in recent years, convertible modular helmets don't always reach the levels of a pure racing full-face helmet at high speeds.

Overall, for everyday road use the advantages far outweigh the compromises, so much so that convertible helmets are now among the best-selling in the motorcycle helmets category.

Polycarbonate, tri-composite fiber and carbon fiber: the differences

One of the aspects that most affects the weight, comfort and price of a modular helmet is the outer shell material. Here are the main differences:

Polycarbonate

This is an injection-molded thermoplastic, the most common solution in the mid-range because it allows excellent levels of safety to be achieved at a low production cost. The main disadvantage is the weight, slightly higher than fibers, and a lower possibility of making shells in multiple sizes (often a single shell covers multiple internal sizes).

Tri-composite fiber

This comes from combining fiberglass, aramid, and other hand-layered technical fibers. The result is a shell that is lighter and stiffer than polycarbonate, capable of better distributing impact energy and usually available in multiple shell sizes to better adapt to different sizes, with benefits for the helmet's balance and aesthetics.

Carbon fiber

This represents the top of the range: it is the lightest material overall for the same strength, with an excellent stiffness-to-weight ratio. A carbon helmet significantly reduces neck fatigue on long trips and is the preferred choice for those who cover many kilometers or seek maximum performance, in exchange for a more significant investment.

The LS2 Advant range: which one to choose

At LS2, the reference point for convertible modular helmets is the Advant family, available in different versions to meet different needs and budgets.

LS2 Advant X

The Advant X model features a composite fiber shell, dual P/J certification, an internal sun visor operated with a single control, Pinlock preparation on the main visor and a quick-release strap system. It is the ideal choice for those who want all the benefits of fiber without moving into the carbon segment.

LS2 Advant X Carbon

The Carbon version features the entire technical equipment of the Advant X but with a shell made entirely of carbon fiber: less weight on the head, greater structural rigidity and a sportier look for those who travel long distances and want to minimize neck fatigue.

LS2 Advant II

The Advant II is the most recent evolution of the family, with updates to aerodynamics, ventilation and the chin guard opening mechanism, designed for those looking for the most up-to-date convertible modular helmet in the LS2 catalog.

You can compare all the versions directly in the motorcycle helmets section of our shop, along with the dedicated accessories available in the motorcycle accessories category.

Practical tips for purchasing

• Always check for dual P/J certification if you plan to regularly ride with the chin guard flipped back.
• Try the size with the chin strap fastened: a modular helmet should feel snug but not painful, with no pressure points on the temples or forehead.
• Check for the presence of Pinlock: essential for those who ride in winter or in humid conditions, to avoid visor fogging.
• Consider the weight based on your use: for the city, polycarbonate is more than sufficient, for touring and long distances composite fiber or carbon really make the difference.
• Think about maintenance: a regularly cleaned and sanitized interior extends the life of the helmet and improves comfort. Products such as the sanitizing spray for helmet interiors and the anti-fog spray for visors are a great ally for those who use the helmet every day.

In conclusion

A convertible modular helmet with a 180° flip-up chin guard is the most versatile solution for those who don't want to choose between the protection of a full-face helmet and the comfort of a jet helmet. By carefully evaluating the shell material, technical features, and your actual usage needs, the LS2 Advant range offers an option suitable for practically every motorcyclist, from the urban commuter to the seasoned traveler.