Kask Protone Review: Is it Still Worth it in 2022?

Kask Protone Review: Petr Minarik with a white Kask Protone outside

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This is my Kask Protone review.

I’ve been using it for the last couple of months, and in this article, I share my experience, comparison with other helmets I have used, and much more.

My overall impressions of this helmet are predominantly positive. I believe Protone belongs among the best road bike helmets.

If you are not sure you should buy it, I can honestly recommend it. You can buy it here, or…

Read this entire article to learn more about what you can expect.

What’s in the Box?

Kask road bike helmets usually come in a white/green or grey/green box without many accessories. I have already worn Kask Mojito, and it came in the same box.

Kask Protone box on a wooden table
Kask Protone box
White Kask Protone with a protective sleeve and instructions manual contents
Kask Protone box contents

The box only includes the helmet, protective sleeve, and instruction manual.

In the Box

  • Helmet
  • Protective sleeve
  • Manual

Technical Specifications

  • Available sizes
    • S 19.7-22 in (50-56 cm)
    • M 20.5-22.8 in (52-58 cm)
    • L 23.2-24.4 in (59-62 cm)
  • Claimed weight: 0.51 lb / 230 g (size M)
  • Actual weight: 0.5 / 227 g (size M)
  • Passed WG11 rotational impact test (learn more)

My Experience with Kask Protone Helmet

Here, I summarize the pros and cons of Kask Protone in depth.

Kask Protone Helmet Pros

  • Well-ventilated
  • Highly adjustable fit
  • A large variety of colors available
  • Semi-aero design
  • Removable padding
  • Leather chin strap
  • Decent sunglasses compatibility

Kask Protone Helmet Cons

  • Spare padding is not included
  • Poorly made transition between outer shells
  • Too well-ventilated for winter riding
  • No MIPS

Kask Protone Pros in Detail

Kask Protone is one of the best-ventilated helmets on the market. Paradoxically, I find it too well-ventilated for winter riding. When I switched to Kask Protone from my old helmet (Agu Tesero) during winter, my head was freezing.

However, despite its ventilation, its semi-aero design promises great performance even at higher speeds.

Kask Protone from multiple angles
Me wearing the Kask Protone

The second major advantage is the retention system that is highly adjustable (except for the dial, you can move it up or down and make it narrower or broader – see pictures below). I have a weirdly shaped head, and only some helmets fit me as well as Protone.

Kask helmets offer a unique fit. I used to have Kask Mojito, and it also fitted me well (much better than helmets from Giro, Specialized, or Bell).

Kask Protone rear dial position adjustment
Kask Protone rear dial position adjustment
Kask Protone retention system adjustment
Kask Protone retention system adjustment

Initially, I was not a big fan of Protone’s design, but it started to grow on me. It compliments people of different face shapes and suits women particularly well.

NOTE: Kask introduced Protone Icon in 2022, which has slightly reimagined shapes.

With plenty of colors available, it is easy to choose the one you like, which will go along with the rest of your kit.

A few more things worth mentioning:

  • The leather chin strap feels solid. I am sure it will last the test of time.
  • The helmet is decently compatible with cycling sunglasses. I tried it with Scicon Aeroshell sunglasses, and I can put them inside upside down.

Kask Protone Cons in Detail

The thing that annoys me the most about helmets is usually the padding. It tends to wear out over time. Unfortunately, Kask Protone doesn’t come with spare padding. It is sold separately, and it is not cheap. It starts at around $15. Fifteen dollars for a few pieces of pads? I find them overpriced.

Another thing I don’t like is the transition between the top and the bottom plastic outer shell. It simply doesn’t look well-made.

One of my friends has the white/red variant of Protone, and it doesn’t look so terrible because of the different colors. But the while color variant looks bad.

White Kask Protone road bike helmet on a wooden table outter shell transition detail (front view)
Outer shell transition detail (front view)
White Kask Protone road bike helmet on a wooden table outter shell transition detail (side view)
Outer shell transition detail (right side view)

Kask Protone Alternatives

If you are looking for a well-ventilated road cycling helmet, one of the Kask Protone alternatives could be:

Browse more road bike helmets in my roundup article on the best road bike helmets for inspiration.

Kask Protone Helmet FAQ

My Verdict

Overall, I am delighted with Kask Protone. It is a perfect road bike helmet for hot summer days because it is one of the best-ventilated helmets.

However, it is so well-ventilated that I find it unsuitable for winter riding. I also like its high adjustability, so it fits me perfectly.

The only shortcomings I found are a bad transition between the two outer shells and the lack of extra padding in the box.

Additionally, for some people, the absence of MIPS can be a dealbreaker.

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