KASK Protone Helmet

KASK Protone Helmet
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HJC Valeco

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  • Trustpilot review 9.6 out of 71.753 reviews


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The Protone is the ''do it all'' aero helmet of KASK. The Protone offers the optimal combination of aerodynamics and cooling. Thanks to its Octofit adjustment system and divider earband you can adjust your Protone easily, quickly, and precisely for a perfect fit. Because of its eco-leather strap it is is very comfortable and prevents irritation on the skin. This strap is washable just like the helmet pads. Thanks to these features the Protone is the helmet perfect for both competitive professionals and the stylish touring riders.

Kask wanted more input besides Team Sky's so they spent a great amount of time to data research, position analysis (how does a rider behave on a bike) and thermodynamic studies. For example: what is the best way to put away cycling glasses in the helmet without increasing drag.
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9.6 / 10
Average from 8 reviews
8 reviews
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0 reviews
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Most recent reviews

10 / 10

Light and stylish

- Alex 11 June 2017

Done my research and if the protone is good enough for Froome then it's good enough for a man with all the gear and no idea! Was the cheapest around as usual, It is well ventilated and looks good! Haven't yet crashed my big bald head in it yet but if the claims are to be believed then it should keep all the cerebral matter in place, lots of ways to tighten and adjust, padding is comfortable and you don't realise it's on! Quick delivery as usual! Great service

Pros & Cons

Good price
Highly adjustable

9 / 10

Best cycling helmet available

- Dermot 2 June 2017

Improvement on my previous helmet kask vertigo, comfortable, light, even in a size large, fully adjustable to fit the shape of your head, a "glove" like fit for the head. Recommended

10 / 10

Great helmet and price

- Mick 11 January 2017

Great helmet you can see why team sky use them

Pros & Cons

Good colour scheme
Good fit
Light weight
Plenty of adjustment
Well vented
Price can be expensive

9 / 10

Snygg och bra passform

- Erik 17 September 2017

Genomarbetad hjälm. Gillar hak-remmen i konstläder.

Pros & Cons

Bra passform
Håller ett par glasögon bra
Ingen mips

10 / 10

God oplevelse

- Rene 11 June 2017

Lækker hjelm der sider godt.

Pros & Cons

God service
Hurtig levering
Lækker produkt.
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KASK Protone HJC Valeco POC Omne AIR SPIN Giro Cinder MIPS
KASK Protone HJC Valeco POC Omne AIR SPIN Giro Cinder MIPS
8 reviews 1 review 52 reviews 201 reviews
Including Visor No No No No
Model Year 2017 / 2018 2021 2021 2020 / 2021
Ventilation ★★★☆ ★★★☆ ★★★★ ★★★☆
Road Helmet Type All-round helmet All-round helmet All-round helmet All-round helmet
Helmet Size (Head circumference in cm) S / M / L / 50 - 56 cm S / M / L / 51 - 56 cm S / M / L / 50-56 cm S / M / L / 51 - 55 cm
Colour Bianco Azzurro / Blue Matt / Navy Blue Pink / Nero Azzurro / Nero Bianco / Nero Lime / Nero Matt-Rosso / White Navy Blue Black / White / Red / Blue Black / White / Orange / Grey Matte Black / Matte Red / Matte White
From 152.43 152.48 162.59 152.43
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All specifications

Detailed product description


3D Dry
The padding in this helmet uses 3D-Dry technology, which offers optimal comfort and performance.

Aero Control
This helmet is fitted with a wind-tunnel tested aerodynamic shell. Whichever way you’re looking, the air exhaust will always be able to do its work.

ECO Chinstrap
An anti-allergenic and washable chin strap with high levels of comfort. Helps prevent skin irritation.

M Moulding
This technique connects the inner polystyrene layer to the outer polycarbonate one, together offering more shock absorption.

MIT Technology
The MIT technology ensures your head is optimally protected. The polycarbonate layer covers the entire helmet: base, lower ring, and rear.

Octo Fit
The rubber micro dial adjustment system on the helmet can be operated with a single hand. The dial can be turned 180 degrees, allowing you to quickly and easily tune the fit. The Skeletal brackets have been designed to optimally support your head.

The pads have an antibacterial coating designed to prevent any foul smells.

Additional information

• Sizes: M (52-58 cm) & L (59-62 cm)
• Weight: 233 grams (size M Weighed by