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Kask
Protone Helmet

Mfg PartNum:
  (57 customer reviews)
2999
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The Kask Protone Helmet's sleek profile was designed with the aid of computational fluid dynamics software to create a shape that retrains its efficiency in the wind through all head angles. The result is a helmet that's quiet and low-drag in any position on the bike, instead of merely touting numbers calculated in a wind tunnel under controlled conditions.

For a highly personalized fit, Kask's Octo Fit retention system features a rubberized dial tension adjuster, plus vertical adjustability and movable rear cradles. The Coolmax lining has an antimicrobial treatment, and the chin strap is made from eco-leather that's washable along with being super soft to prevent irritation.

Available in multiple sizes and colorways. A helmet storage bag is also included. Made in Italy.


Sizing:

  • M - 52-58 cm 20-1/2 - 22-7/8 Inches
  • L - 59-62 cm 3-3/8 - 24-1/2 Inches

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

SML
Head Circumference19½"-22"20½"-23"23¼"-24½"   
 

Black - Small

Mfg PartNum: CHE00037.210 S 

Black - Medium

Mfg PartNum: CHE00037.210 M 

Black - Large

Mfg PartNum: CHE00037.210 L 

White - Small

Mfg PartNum: CHE00037.201 S 

White - Medium

Mfg PartNum: CHE00037.201 M 

White - Large

Mfg PartNum: CHE00037.201 L 

Matt Black - Smail

Mfg PartNum: CHE00037.211 S 

Matt Black - Medium

Mfg PartNum: CHE00037.211 M 

Matt Black - Large

Mfg PartNum: CHE00037.211 L 

Red - Medium

Mfg PartNum: CHE00037.204 M 

Red - Large

Mfg PartNum: CHE00037.204 L 

Lime - Medium

Mfg PartNum: CHE00037.213 M 

Lime - Large

Mfg PartNum: CHE00037.213 L 

Matt Blue - Small

Mfg PartNum: CHE00037.256 S 

Matt Blue - Medium

Mfg PartNum: CHE00037.256 M 

Matt Blue - Large

Mfg PartNum: CHE00037.256 L 

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Perfect for me
rating
by Anonymous
Portland

I first bought a giro aether and returned it after trying it on a couple times. It felt like it sat over my head and the spherical mips felt too loose, like it would slide right out of the way with a crash. Could move the thing around with my hands easily, felt gimmicky. Parts felt cheap too. Got the protone and it is a solid, perfect fit. It sits around my head and is snug yet comfortable. I have a somewhat �longer/skinny� head. Strap and parts are much more robust and I like the leather chin deal. MIPS would be nice, but it feels great. Put in a good amount of miles, but no real tests.

Reviewed 8/18/2020
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JUST AS I EXPECTED FROM KASK AND THE INCREDIBLE SPEED OF THE DELIVERY TO HAWAII
rating
by Anonymous
Cycling Enthusiast
Honolulu, Hawaii

I have tried every helmet at every bicycle shop here on the island of Oahu. None of them fit the way i wanted. Had experience with KASK and decided to stick with what i know works.

Reviewed 10/23/2019
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What youd expect from a high end helmet
rating
by Anonymous
Competitive Racer
SF Bay Area

It is a helmet and, not having crashed (knock wood), I cant comment on its protective charateristics. It is well ventilated, so much so that I sweat less in it than my Kask Vertigo or Giro, so that is a big plus. The chin retention strap is easy to adjust and comfortably holds the helmet firmly in place. The size adjustability knob also functions smoothly, dials in head diameter perfectly, and is easy to adjust, even on the fly. The only small complaint is the foreaft adjustment harness which was a bit bothersome at first - but once I got used to it I hardly noticed any chafing on the back of my neck. All in all, it is an expensive helmet, but its adjustability allows for pretty much a perfect fit. Funny thing though is that while its head volume is as advertised, the shell is smaller than the Kask Vertigo, so it appears, outwardly, to be smaller than it actually is. In its price point, I would recommend it.

Reviewed 5/24/2019
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Cool and sleek
rating
by Chenz
Chicago IL

A great looking helmet! Definitely can feel the cooling effects of all the vents. Easily adjustable. Definitely recommend it

Reviewed 9/26/2019
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So Cool!
rating
by coyvicsvicoy
Cycling Enthusiast
Los Angeles
2 of 2 customers found this review helpful.

I like this Matte Black finish of the Protone! It is literally and figuratively so COOL. Because it is Matte Black, you can pair it with any color jersey and you will still look like you have a matching kit. The vents are really well designed that it cools my head during a hot Southern California mountain climb! Also the design is so Aero that it gives you that advantage, now I can also enjoy the minimal gains that this terrific product provides and I love it....I have TWO of these already and planning on getting a 3rd one!!!! That's how much I like the Protone helmet from KASK.

Reviewed 2/9/2018
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Awesome helmet
rating
by Arcee
CA
1 of 1 customers found this review helpful.

Fits great, looks great and lots of ventilation, love the Matte black color.

Reviewed 7/3/2017
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Super light and aero
rating
by Anonymous
Casual Cyclist
1 of 1 customers found this review helpful.

The Protone is a great helmet for long rides. Recently used it while riding a century a few weeks ago in 80 degree weather. I have a black helmet and I never felt over heated because it's well ventilated. It's also super light and fairly aero.

Reviewed 5/30/2017
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Very nice helmet
rating
by JB
Santa Rosa Ca

This is the best Helmet I've ever own Very comfortable

Reviewed 2/7/2019
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Nice helmet
rating
by stmoon
Cycling Enthusiast
Beaverton, OR

Well ventilated. Leather(ish) chin strap feels nice and soft. Snug fit for me. Check if you plan to wear a cap underneath.

Reviewed 9/11/2018
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This is 1 cool helmet
rating
by Bikin''Beagles
Cycling Enthusiast
Sacramento

I ride in the Sacramento valley where in the summer the temps can easily exceed 100 degrees. The Kask Protone helmet meets the challenge with flying colors. Since I have few shingles on the roof, I also have to wear a wrap on my head, and I stay cool all day long, look pretty cool as well.

Reviewed 6/11/2018
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Top notch multi purpose helmet.
rating
by Anonymous
Casual Cyclist
Chicago, IL

Love it, very comfortable and light weight helmet. A nice upgrade from the Vertigo 2.

Reviewed 4/30/2018
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Great helmet and if going to Buy one get it from western bike works great price
rating
by Anonymous
ny ny
1 of 1 customers found this review helpful.

This is my second One I would not buy any other helmet fits great and evaporate sweat great and very comfortable .

Reviewed 1/25/2018
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Great light comfortable helmet
rating
by MV
Cycling Enthusiast
LA
1 of 1 customers found this review helpful.

Great helmet, been using it for several months now. Lightweight and comfortable, lots of vents throughout. I notice that the outer shell is very soft and brittle, well as least the matte version of this helmet, so be careful not to scratch or drop it. The front padding soaks up a lot of sweat when climbing in direct sunlight so I had to position the padding up towards the vents to help dry it out.

Reviewed 1/20/2018
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Super high quality helmet
rating
by Anonymous
Fruita,CO
1 of 1 customers found this review helpful.

Excellent adjustability and high quality chin strap.

Reviewed 1/1/2018
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Awesome helmet
rating
by Brian
Vancouver WA
1 of 1 customers found this review helpful.

This is the best fitting helmet with the best chin strap system Ive owned to date. The size is good and the outer shell size feels relatively small for a Large. The only criticism is the clear coating or sealant seems to be peeling in a few internal areas but not a big deal. Highly recommend

Reviewed 10/19/2017
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Top quality
rating
by VJC
1 of 1 customers found this review helpful.

Very adjustable, comfortable and well thoughtout. Best chin strap Ive ever had

Reviewed 3/16/2017
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Do you want to feel really good about spending money?
rating
by MatM
Cycling Enthusiast
Gambrills, MD
1 of 1 customers found this review helpful.

I have the Kask Mojito from a few years back. A really good helmet. It has a two way fit. The Protone has the Octofit. Its pretty slick how you can really dial in your fit. I bought a medium and and Im the upper end of the medium. I didnt need to adjust the chin strap. Im a big fan of how the buckle is offset and not in the middle of your chin. I gave it a few cranks on the back. Very nice fit. I cant say if this helmet is noisy as of yet, its gust in here today. Ive been more focused on staying upright. But my initial indications say its probably no noisier than any other aero helmet Ive used.

Reviewed 5/4/2020
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Best helmet, EVER
rating
by AndyS
Competitive Racer
Fountain Hills, Arizona
1 of 1 customers found this review helpful.

Most comfortable helmet I have ever worn. Great price too. Kask Protone is now my Go TO helmet.

Reviewed 4/6/2020
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Great Fit & Appearance
rating
by John
Daily Commuter
New York, NY
1 of 1 customers found this review helpful.

I have a large head and have owned a lot of helmets over the years, mainly Bell and Giro. This is the best-fitting helmet I've owned (I got the 59-62). I put it on and forget it's there. The strap connection points are adjustable so they position around your ears well, and the under-chin strap is comfortable. The buckle's in an odd place, right against the corner of my jaw, but I don't notice it while riding-mainly an aesthetic issue. The helmet nicely snugs around the crown and back of my head, and it's contoured well so it doesn't look too much like a mushroom atop my big head.

I may be imagining it, but the helmet also feels very aero from all angles. I ride in a lot of cross- and head-wind, and the wind doesn't seem to catch my head like it did with my Bell Sweep. I haven't ridden in hot weather yet so I can't speak to cooling or sweat management.

Reviewed 5/30/2019
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Great fit, comfortable and looks good
rating
by VanBiker
Cycling Enthusiast
Vancouver, BC
2 of 2 customers found this review helpful.

The Protone fits well, is comfortable and the slimmer profile makes it more attractive than many bulbous helmets on the market. The quality of finish is excellent and the level of comfort is high. A helmet is definitely worth spending extra money on if you find it comfortable, you like the looks and it provides some level of protection. As one who struggles with sweat in the eyes, the Protone offers little help. That said, I have yet to find a helmets solves that problem. Hats and headbands are my only solution. As usual, Bike Tire direct service was excellent.

Reviewed 5/6/2019
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