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Kask
Protone Helmet

Mfg PartNum:
$299.95
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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
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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Do you want to feel really good about spending money?
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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JUST AS I EXPECTED FROM KASK AND THE INCREDIBLE SPEED OF THE DELIVERY TO HAWAII
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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Best helmet, EVER
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
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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What youd expect from a high end helmet
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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Great fit, comfortable and looks good
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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Excellent helmet, well made, well vented, be careful on the sizing!
by Rick @OCRR
Cycling Enthusiast
Los Angeles, CA

Overall I like the KASK helmet, reasonable weight, very well vented, but be careful on the sizing. I am a very medium sized guy but the medium helmet was almost too small on me. I had to max out the sizing adjustment ring to get an acceptable fit. Straps are well located, attachment buckle is on the side where it does not touch your head, so that is a very nice feature.

Reviewed 1/30/2020
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Excellent Helmet
by Z5_Rider
Cycling Enthusiast
New York, NY
2 of 2 customers found this review helpful.

Bought a Medium on sale and my 58 head fit perfectly. Adjustments are more advanced than other helmets on the market. Great chin strap. Bonus, I do not look like a mushroom.

Reviewed 11/9/2018
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Cool and sleek
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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Protone Helmet
by Jason
Idaho

Head size 22 and 56 cm approx. and purchased medium that fit well, strap and adjustment are very nice, helmet is light would definitely recommend.

Reviewed 3/23/2020
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So Cool!
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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My Best Helmet
by Ken B
Cycling Enthusiast
DFW Texas
1 of 1 customers found this review helpful.

Out of my 6 top brand helmets this is my favorite. Great fit, better straps than other helmets, plenty of air flow in the Texas heat.

Reviewed 8/30/2019
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Great Ventilation and Fit!
by Anonymous
Cycling Enthusiast
Santa Monica, CA
2 of 2 customers found this review helpful.

I have an enormous skull and this is a great fit, which is a rare treat. Cool and quiet. Love!

Reviewed 7/6/2017
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Awesome helmet
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
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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Amazing and highly adjustable
by misterbentley
Cycling Enthusiast
NYC
0 of 2 customers found this review helpful.

Love this helmet.

I've always been fearful of buying helmets online as there is generally a round or oval config for the shape...Kask's design is amazing. No issue and a dialed-in fit every time.

Reviewed 5/13/2019
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kask Protone
by Anonymous
1 of 2 customers found this review helpful.

This helmet is the lightest and most comfortable Ive ever owned. Dont look any further. Just do yourself a favor and buy it from Bikestiresdirect. You wont regret it.

Reviewed 4/28/2019
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This is a top notch helmet
by Anonymous
Texas
1 of 1 customers found this review helpful.

I love the fit. Very adjustable. The leather chin strap is very nice. I have taken a hard wreck in one and got my clocked cleaned pretty good but no concussion. Great helmet.

Reviewed 4/26/2019
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Light weight good fit
by Anonymous
NYC
1 of 1 customers found this review helpful.

This is my second Protone one I bought Large which was too Large. This time bought medium it fits snug with enough room for caps. Very light and comportable. Havent test safety(I hope Ill never have to)

Reviewed 4/26/2019
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