LS2 FF817 Challenger II Helmet – Viper White/Blue/Red
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Size chart LS2 FF817
| Size | Head circumference (cm) | Head circumference (inch) |
|---|---|---|
| XXS | 51–52 cm | 20.1–20.5 in |
| XS | 53–54 cm | 20.9–21.3 in |
| S | 55–56 cm | 21.7–22.0 in |
| M | 57–58 cm | 22.4–22.8 in |
| L | 59–60 cm | 23.2–23.6 in |
| XL | 61–62 cm | 24.0–24.4 in |
| XXL | 63–64 cm | 24.8–25.2 in |
| 3XL | 65–66 cm | 25.6–26.0 in |

How to measure your helmet size correctly: To find the right helmet size, measure your head circumference with a flexible tape measure.
It is important that the tape measure runs around the widest part of the head – only then will you get a correct result.
Place the tape measure at the front, about 1–2 cm above the eyebrows, and run it along the sides above the ears.
At the back, the tape must run over the largest part of the back of the head (not too low on the neck). The tape may run slightly at an angle – what matters is that it sits all the way around the largest points of the head.
Make sure the tape measure sits snugly but does not dig in. Measure 2–3 times for the most accurate result. You can then compare the measured value in centimetres (cm) with our size chart.
Tips for an accurate result
- Keep hair flat (e.g. do not measure over a voluminous hairstyle)
- Keep the tape horizontal, i.e. along the largest circumference
- Do not measure too loosely
- For values between two sizes:
→ usually choose the larger size (depending on helmet model / fit)
Important note on fit
The right helmet should fit firmly without causing uncomfortable pressure points.
A new helmet may feel a little tighter at first, as the inner lining adapts slightly over time.
- Worldwide shipping
- Genuine parts & verified quality
- Personal email support
- 14-day returns — in stock ships within 24h
Shipping & Returns
We ship with DHL and FedEx — express on request. If an item is in stock, express delivery can often go out within 1 business day. Standard delivery takes about 2–5 business days domestically and usually around a week worldwide. Please check the available shipping options and delivery times in your cart, as we offer several carriers depending on the country.
Returns must be registered in advance by email and are possible in line with our cancellation policy (14-day return request + 14-day return window after approval). Please note: unregistered returns are not accepted. You'll find all details on conditions, exceptions and refunds in our cancellation policy.
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The Viper pattern is the busiest LS2 puts on this shell — interlocking shapes that wrap the sides and crown. In white, blue and red with a gloss coat, it is the extrovert of the range.
An HPFC shell in three sizes
Underneath the paint sits high-performance fibreglass composite. It is the material LS2 uses where durability matters more than the last hundred grams, and it keeps this helmet at 1500 g while meeting ECE 22.06.
Eight sizes, three shells. It is the sensible middle ground — not the six-shell extravagance of a race helmet, but far from the one-size-fits-all approach that makes small helmets look inflated.
1500 Gramm klingen nach viel, solange man sie nicht mit dem vergleicht, was sonst in dieser Klasse auf dem Kopf sitzt. Mit ausfahrbarer Sonnenblende, Pinlock-Vorbereitung und drei Schalengrößen ist das ein guter Wert — die Blende allein kostet die meisten Helme schon 80 bis 100 Gramm.
About the Viper White/Blue/Red finish
Deep blue dominates, with white opening the pattern up and red sharpening the transitions. The gloss finish gives each panel its own highlight, so the graphic reads differently depending on where the sun is. Asymmetric by design — the two sides of the helmet do not match, which is worth knowing if you have a preferred camera side.
Airflow from the top down
Ventilation runs top-down rather than through the chin: intakes on the crown, channels moulded into the EPS, and exhausts at the rear. A breath deflector keeps exhaled air off the visor.
Die Auslässe hinten arbeiten mit dem Unterdruck, der sich bei Fahrt hinter dem Helm bildet. Das funktioniert ab etwa 60 km/h spürbar und ist der Grund, warum sich die Belüftung auf der Landstraße deutlich besser anfühlt als im Stand.
Seeing out
You get an oversized aperture through a hardcoated, UV-resistant screen, sealed by a double-injection gasket. The Pinlock 120XLT MaxVision insert comes as standard, and the visor locks shut with a positive button catch.
The integrated sun visor covers the light conditions a clear visor cannot, and unlike most it is designed to be removed by hand for cleaning or replacement.
Die Doppel-Einspritz-Dichtung ist so ein Detail, das man erst im Regen bemerkt: Statt einer aufgeklebten Gummilippe wird die Dichtung in zwei Materialhärten direkt an die Visieröffnung gespritzt. Sie hält länger und dichtet zuverlässiger als eine nachträglich montierte.
Holding on, and letting go
The chin strap closes with a micrometric metal buckle on a reinforced strap. Emergency-release tabs let the cheek pads be pulled clear at the roadside, and the shell carries a metal certification plate.
Die metallische Prüfplakette ist mehr als Zierde: Sie ist der physische Nachweis der ECE-22.06-Zulassung und wird bei Kontrollen in manchen Ländern tatsächlich angesehen. Ein aufgeklebtes Etikett löst sich mit den Jahren, die Plakette nicht.
The bit you actually touch
Inside, a COOLMAX lining handles sweat rather than just absorbing it: moisture is wicked outward and dries fast. Antibacterial, hypoallergenic, and it lifts out for washing.
Herausnehmbar und waschbar klingt selbstverständlich, ist es aber nicht — bei vielen Helmen dieser Klasse lässt sich nur das Kopfpolster entnehmen. Hier gehen Kopfpolster und Wangenpolster heraus, und beide vertragen Handwäsche.
What it is built for
Wer viel und weit fährt, merkt den Unterschied nicht am ersten Tag, sondern am dritten: An dem Punkt zahlen sich Feuchtigkeitsmanagement, ein ruhiger Sitz und ein Verschluss, den man mit Handschuhen bedienen kann, deutlich mehr aus als ein paar hundert Gramm weniger Gewicht.
In the box
- LS2 FF817 Challenger II helmet — Viper White/Blue/Red
- Elastic carrying bag
- Pinlock 120XLT MaxVision anti-fog insert
- Reflective stickers
Specification
- Shell — HPFC high-performance fibreglass composite, three shell sizes
- Weight — 1500 g (±50 g)
- Sizes — XXS to XXXL (eight sizes)
- Homologation — ECE 22.06
- Retention — micrometric metal buckle, reinforced strap, emergency release, metal safety plaque
- Visor — Max Vision aperture, scratch-resistant, UV-stable, double-injection seal, button lock, Pinlock 120XLT MaxVision supplied
- Sun visor — integrated, tinted, tool-free removal system
- Ventilation — top intakes, rear extractors, ducted EPS, breath deflector
- Liner — COOLMAX, antibacterial, hypoallergenic, removable and washable
- Chin curtain — magnetic
- Intercom — prepared for the current LS2 Bluetooth system
- Finish — Viper graphic, gloss
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Built-in sun visor
Included
LS2 Pinlock 120XLT MaxVision Insert DKS611
Included free
helmet only
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LS2 FF817 Challenger II Helmet – Viper White/Blue/Red

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