Table Of Contents

Kask Protone Review: The Best Road Bike Helmets of 2020 – Cycling Helmet Review

  • Comfort, Fit, and Adjustability 80% 80%
  • Weight 80% 80%
  • Ventilation 70% 70%
  • Aerodynamics 90% 90%
  • Safety Tech and Additional Features 50% 50%

Price: $194.97 – $224.96

Weight: 248g

Vents: 20

Fit System: Octo Fit

Safety Tech: In Molding, MIT

What We Like: Highly Adjustable, Aerodynamic

What We Don’t: No MIPS, Falls Short of the Giro Synthe’s Adjustability and Ventilation

Since being introduced to the world as the go-to helmet for Team Sky, The UK’s premier cycling team, the Kask Protone has been an intriguing and extremely popular helmet among riders of all stripes. It is aerodynamic, lightweight, and boasts a ton of unique features. All that is left is to see if it really lives up to the hype.

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Compare to Similar Products

See Our The Best Road Bike Helmets of 2020: Cycling Helmet Review!

POC Ventral SPIN

  • Comfort, Fit, and Adjustability 100% 100%
  • Weight 70% 70%
  • Ventilation 90% 90%
  • Aerodynamics 100% 100%
  • Safety Tech and Additional Features 100% 100%

Pros

Unparalleled Combination of Weight

Safety

Ventilation

Cons

Price

Weight: 280g

Vents: 14

Fit System: Proprietary 360 Degree Retention System

Safety Tech: SPIN

Giro Synthe MIPS

  • Comfort, Fit, and Adjustability 100% 100%
  • Weight 70% 70%
  • Ventilation 80% 80%
  • Aerodynamics 90% 90%
  • Safety Tech and Additional Features 90% 90%

Pros

Highly Adjustable

Well Ventilated

Aerodynamic

Great Sale Prices

Cons

MSRP is Nearly as Expensive as the POC Ventral Spin

Weight: 268g

Vents: 26

Fit System: Roc Loc 5 Air

Safety Tech: MIPS

Lazer Z-1 MIPS

  • Comfort, Fit, and Adjustability 90% 90%
  • Weight 60% 60%
  • Ventilation 100% 100%
  • Aerodynamics 60% 60%
  • Safety Tech and Additional Features 90% 90%

Pros

MIPS

T Pro

Highly Adjustable

Magneto Eyewear Doc

Cons

Heavy

High MSRP

Weight: 284g

Vents: 31

Fit System: ARS Advanced Rollsys System

Safety Tech: MIPS, T Pro

Giro Aether MIPS

  • Comfort, Fit, and Adjustability 100% 100%
  • Weight 70% 70%
  • Ventilation 80% 80%
  • Aerodynamics 90% 90%
  • Safety Tech and Additional Features 100% 100%

Pros

MIPS Spherical

Roc Loc 5+ Air Fit Retention System

Cons

Staggering Price Tag

Weight: 267g

Vents: 11

Fit System: Roc Loc 5+ Air

Safety Tech: MIPS Spherical

Smith Trace MIPS

  • Comfort, Fit, and Adjustability 90% 90%
  • Weight 70% 70%
  • Ventilation 60% 60%
  • Aerodynamics 90% 90%
  • Safety Tech and Additional Features 100% 100%

Pros

Top of the Line Safety Features

Improved Ventilation Over Smith Overtake

Cons

Still Not the Best Ventilation

Price

Weight: 280g

Vents: 18

Fit System: VaporFit

Safety Tech: MIPS, Koroyd

Giro Foray MIPS

  • Comfort, Fit, and Adjustability 80% 80%
  • Weight 60% 60%
  • Ventilation 70% 70%
  • Aerodynamics 80% 80%
  • Safety Tech and Additional Features 80% 80%

Pros

Premium Features at a Budget Price

Cons

Doesn’t Vent or Fit Quite Like the Giro Synthe

Weight: 298g

Vents: 21

Fit System: Roc Loc 5

Safety Tech: MIPS

Bell Stratus MIPS

  • Comfort, Fit, and Adjustability 80% 80%
  • Weight 60% 60%
  • Ventilation 70% 70%
  • Aerodynamics 70% 70%
  • Safety Tech and Additional Features 70% 70%

Pros

Premium Features in a Mid Priced Helmet

Cons

Lacks Some of the Safety Features of the Bell Z20 MIPS

Weight: 296g

Vents: 18

Fit System: Float Fit

Safety Tech: MIPS

Kask Valegro

  • Comfort, Fit, and Adjustability 80% 80%
  • Weight 90% 90%
  • Ventilation 100% 100%
  • Aerodynamics 70% 70%
  • Safety Tech and Additional Features 50% 50%

Pros

Lightweight

Great Ventilation

Cons

No MIPS

Issues With Octo Fit Retention System

Weight: 234g

Vents: 37

Fit System: Octo Fit

Safety Tech: In Molding, MIT

Kask Protone

  • Comfort, Fit, and Adjustability 80% 80%
  • Weight 80% 80%
  • Ventilation 70% 70%
  • Aerodynamics 90% 90%
  • Safety Tech and Additional Features 50% 50%

Pros

Highly Adjustable

Aerodynamic

Cons

No MIPS

Falls Short of the Giro Synthe’s Adjustability and Ventilation

Weight: 248g

Vents: 20

Fit System: Octo Fit

Safety Tech: In Molding, MIT

Bell Z20 MIPS

  • Comfort, Fit, and Adjustability 90% 90%
  • Weight 50% 50%
  • Ventilation 80% 80%
  • Aerodynamics 70% 70%
  • Safety Tech and Additional Features 80% 80%

Pros

Float Fit Race Retention System

Ventilation

Cons

Weight

Nowhere to Stash Sunglasses

Weight: 305g

Vents: 18

Fit System: Float Fit Race 

Safety Tech: MIPS

Kask Mojito X

  • Comfort, Fit, and Adjustability 70% 70%
  • Weight 100% 100%
  • Ventilation 60% 60%
  • Aerodynamics 60% 60%
  • Safety Tech and Additional Features 50% 50%

Pros

Solid Performer in Every Category

Cons

Doesn’t Vent or Fit Quite Like the Giro Synthe

Weight: 220g

Vents: 26

Fit System: Up & Down Fit System

Safety Tech: MIT, In Molding

Comfort, Fit, and Adjustability

The Kask Protone uses Kaske’s Octo Fit adjustment system, which helps to make the Kask Protone one of the most highly adjustable road helmets on the market, and one that fits an extremely wide range of head shapes. In the back, the adjustment bar (where the adjustment dial is located) actually slides up and down a full 2” to provide a much higher degree of vertical adjustment than most helmets offer. This is perfect for riders who often find that helmets want to tip forward and back on their heads. Wing-shaped cups and a traditional dial adjustment round off the Kask Protone’s adjustment system, and these features all work extremely well together. 

The Kask Protone’s Octo Fit system does come with a few downsides. First, the vertical adjustment does not lock in place, which means that you might find it tipping forward or back on your head, which is the very thing it is meant to guard against. This will likely be more of a problem for those riding gravel or in other situations that are bumpier than the average road ride. Second, some riders felt a bit of a pressure point near the temples when the helmet was adjusted to fit correctly everywhere else.

Kask also uses an “eco-leather” synthetic chinstrap. This pleather-like material makes for an extremely comfortable chin strap, which is a small but nice addition to any helmet. At the ears, the Y shaped ear straps do not adjust, like the ones on the Giro Synthe. While we were quite fond of this minimalist setup on the Bell Super DH mountain bike helmet, the Y is not quite as large on the Kask Protone, and depending on where in the vertical adjustment you like the helmet, the ear straps might rub your ears.

Finally, the padding inside the Kask Protone is quite plush, particularly for a helmet aimed at weight-conscious riders.

Weight

Weighing in at just shy of 250g, the Kask Protone is a bit heavier than the manufacturer would have you believe. However, this comes from a dedication to comfort and adjustability, from both its plush padding and chinstrap, and from the Octo Fit adjustment system. The Kask Protone also uses a thicker polycarbonate shell over the EPS foam, to protect the helmet from lighter bumps or drops. On the other hand, it does not have a MIPS insert or really anything comparable to one, which tacks ~30g to most of the other high-end road bike helmets on our list.

Ventilation

The Kask Protone’s 20 vents are quite large and well placed, making it one of the more well-ventilated helmets that we reviewed. While it does not quite match the Giro Synthe in terms of ventilation, the Protone’s 20 vents are matched with internal channels that direct airflow across your head at speed. It is only when climbing at slow speeds in hot conditions that the Kask Protone’s ventilation begins to lag behind the Giro Synthe’s.

Safety Tech and Additional Features

The Kask Protone features in molding and a thicker than average polycarbonate shell to protect its EPS foam. However, it comes up short when you consider that just about every other high-end road bike helmet comes with a MIPS liner or another technology to bolster its ability to protect your head from rotational impacts. 

Aerodynamics

The Protone is marketed as an aerodynamic helmet made for everyday riding, and Kask claims that its aerodynamic properties have been molded to be at their maximum level of effectiveness in the positions that cyclists are most often in.

The Bottom Line

The Kask Protone is a top of the line road bike helmet that has been worn by some of the most elite riders on the planet and ridden to victory in the Tour de France. Not surprisingly, such a helmet comes with a fairly steep price tag of around $200. However, considering that the Protone debuted with a price closer to $400, this almost comes off as a bargain.

If a helmet with a maximum range of adjustability, solid aerodynamics, and well above average comfort at a not quite outrageous price is what you are after, then the Kask Protone is a solid choice. However, we felt that the Giro Synthe rivaled or bettered the Protone in almost all of these categories, while also giving you the extra protection of MIPS for a similar price.

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We participate in affiliate programs to help us fund Gear Hacker. Some of the links in this website are affiliate links, which means that if you purchase a product using our link, we will earn a small commission. Don’t worry! This comes at no additional cost to you, and we will never base our reviews on whether or not we earn a commission off of a product. With that said, if you find our review helpful and decide to purchase an item we review, we would be very appreciative if you use our links to do so. It will help us bring you more awesome content in the future!