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Apparel / Helmets / Road Helmets
Kask Protone Helmet Yellow Fluo
Kask Protone Helmet Matt Black
Kask Protone Helmet Red
Kask Protone Helmet Black
Kask Protone Helmet Orange Fluo
Kask Protone Helmet Matte Blue
Kask Protone Helmet Grey Matt
Kask Protone Helmet Matte White
Kask Protone Helmet Olive Green Matt
Kask Protone Helmet White
Kask Protone Helmet Light Blue
Kask Protone Helmet Light Blue
Kask Protone Helmet Light Blue
Kask Protone Helmet Light Blue
Kask Protone Helmet Light Blue
Kask Protone Helmet
Kask Protone Helmet
Yellow Fluo
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Kask Protone Helmet Yellow Fluo
Kask Protone Helmet Matt Black
Kask Protone Helmet Red
Kask Protone Helmet Black
Kask Protone Helmet Orange Fluo
Kask Protone Helmet Matte Blue
Kask Protone Helmet Grey Matt
Kask Protone Helmet Matte White
Kask Protone Helmet Olive Green Matt
Kask Protone Helmet White
Kask Protone Helmet Light Blue
Kask Protone Helmet Light Blue
Kask Protone Helmet Light Blue
Kask Protone Helmet Light Blue
Kask Protone Helmet Light Blue
Kask Protone Helmet
Kask Protone Helmet

Kask
Protone Helmet

Mfg PartNum:
$299.95
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Backorder: This item is currently out of stock but is available to purchase today as a backorder. The expected availability date shown above is our best estimate as to when it will be shipped to you, but this date is subject to change based on our receipt of this item from its vendor. Shipping in the continental US is free for all backorder items (for international orders, our customer service team will contact you when the item is available to ship). Your credit card will not be charged until your item ships (Paypal requires payment up front, but you can cancel for full refund). Anytime prior to shipment, your backorder can be cancelled by contacting our customer service team.

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"   
 

Mfg PartNum: CHE00037.210 M 

Mfg PartNum: CHE00037.211 L 

Mfg PartNum: CHE00037.211 M 

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 

Matt Blue - Small

Mfg PartNum: CHE00037.256 S 

Matt Blue - Medium

Mfg PartNum: CHE00037.256 M 

Matt Blue - Large

Mfg PartNum: CHE00037.256 L 

Light Blue - Small

Mfg PartNum: CHE00037.218 S 

Light Blue - Medium

Mfg PartNum: CHE00037.218 M 

Light Blue - Large

Mfg PartNum: CHE00037.218 L 

Olive Green Matt - Small

Mfg PartNum: CHE00037.390 S 

Olive Green Matt - Medium

Mfg PartNum: CHE00037.390 M 

Olive Green Matt - Large

Mfg PartNum: CHE00037.390 L 

Grey Matt - Small

Mfg PartNum: CHE00037.389 S 

Grey Matt - Medium

Mfg PartNum: CHE00037.389 M 

Grey Matt - Large

Mfg PartNum: CHE00037.389 L 

Red - Small

Mfg PartNum: CHE00037.204 S 

Red - Medium

Mfg PartNum: CHE00037.204 M 

Red - Large

Mfg PartNum: CHE00037.204 L 

Yellow Fluo - Small

Mfg PartNum: CHE00037.221 S 

Yellow Fluo - Medium

Mfg PartNum: CHE00037.221 M 

Yellow Fluo - Large

Mfg PartNum: CHE00037.221 L 

Orange Fluo - Small

Mfg PartNum: CHE00037.222 S 

Orange Fluo - Medium

Mfg PartNum: CHE00037.222 M 

Orange Fluo - Large

Mfg PartNum: CHE00037.222 L 

Ordered by Most Relevant First
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(91%)
(8%)
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Comfortable helmet that looks good!
by Phil W
Cycling Enthusiast
Southern Indiana

The Kask Protone is my favorite helmet not only for its looks but for the great comfortable fit that I get. It's lightweight and doesn't ride down on my sunglasses like some other helmets. I also like the assortment of colors available. Thankfully, I haven't tested its crash-worthiness but if the pro teams trust it, I will too. The only drawback is that it's priced higher than many other helmets.

Reviewed 7/9/2021
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Nice fit and decent ventilation for an aero helmet
by Steve
Cycling Enthusiast
Encinitas

The padding and leather chin strap make for a comfortable fit that's better than my previous Giro. Ventilation is decent for an aero helmet but I still get more sweat dripping into my eyes/glasses than I did with my Giro. All in all a good helmet

Reviewed 7/8/2021
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Put to the test!
by N6CK
Santa Cruz CA

I had a hard crash on the Unbound Gravel (DK) 200 on June 5. Shredded my kit, and put some measurable dents and scrapes on my Kask Protone helmet. Hit back up on the bike and carried on for another 100 or so miles. Not even a hint of a headache following the crash. My left shoulder was another story. Great helmet, great protection, easy to recommend for road and gravel rides! Stay active, be well, from this 70 year old cyclist.

Reviewed 6/18/2021
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Light. Protective and Smooth
by paisleigharies
Competitive Racer
Charlottesville, VA
2 of 2 customers found this review helpful.

I bought my first Kask helmet (a Mojito) three years ago at an end of cycling season sale from a shop in Colorado's Rockies. Having finally abandoned my leather helmet for fuller helmer protection in the early 1980's, I have owned scores of plastic-based helmets since then. But I would rate the Kask Mojito to be the most easily adjustable, comfortable, light weight helmet I had ever owned....until I purchased the Kask Protone. It is nothing short of amazing that the Protone is actually lighter than the Mojito, offers the same easily adjustable features and comfort, and provides even greater protection of the noggin than does the Mojito. Yes, this is a lot to pay for a helmet. But when I consider what an hour in an ER with a brain injury might cost, this is a minimal investment. That's why I also bought a Protone for my infrequently riding spouse. I want her to have the same level of protection as I have.

Reviewed 3/18/2021
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Protone
by Van M
pennsylvania

My favorite fitting helmet, looks better than most in my opinion as well.

Reviewed 7/5/2021
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An absolute treat
by Adamm
Cycling Enthusiast
Carson City, NV
2 of 2 customers found this review helpful.

I already have a big head and my vanity will not allow me to slap a double-wide MIPS helmet on top of that. So after returning a top-o-the-line Giro that was as wide as my shoulders, I went looking for the lowest profile helmet I could find and Kask was the answer. Not only does is look great but you barely notice it. I just did a century last Saturday and I didn't think about my helmet once, even though everything else hurts. If it's not an issue over 100 miles it will never be an issue.

Reviewed 10/12/2020
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Perfect for me
by Anonymous
Portland
1 of 1 customers found this review helpful.

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
2 of 2 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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The Protone offers a great, adjustable fit in a less conspicuous form factor.
by Dr J
Cycling Enthusiast
Central Oregon

The fit of the Protone is wonderfully adjustable and ventilated with an end result that makes it disappear.

Reviewed 3/18/2021
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Great low profile helmet... no mushroom head!
by Anonymous
Cycling Enthusiast
Los Angeles, CA

I was looking for a nice low profile helmet and this was the ticket. It's not cheap but you can tell the build quality as soon as you take it out of the box. I got the matte black and might get a white one too for those days where you need to be more visible. The leather strap thing under the chin is a nice touch for added comfort.

Reviewed 9/29/2020
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Great Fit & Appearance
by John
Daily Commuter
New York, NY
2 of 2 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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Very happy with this purchase; fits well and very nice quality.
by Anonymous

Very good aero helmet

Reviewed 2/15/2021
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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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Kask Protone
by Pops
61704
1 of 1 customers found this review helpful.

Great helmet. I love the fit on these helmets. I've wrecked on two occasions, but the helmet did there job to protect my head.

Reviewed 1/11/2021
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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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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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Excellent helmet, well made, well vented, be careful on the sizing!
by Rick @OCRR
Cycling Enthusiast
Los Angeles, CA
2 of 2 customers found this review helpful.

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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