Kask Protone vs Giro Synthe

Bike helmets may sound like a hassle but they are necessary to keep your head and brain safer during the ride. There are lots of options to consider but if you are into speed riding and prefer comfortable helmets, Kask Protone Vs Giro Synthe will be a great choice to consider. Both of them are designed for road riding and loved for the comfort but, before getting one, go check which of them will be the best choice and seems to fit your preference the most here. 

In this article, we are going to give you information about:

  • How Bike Helmet can Save Cyclist
  • How to Choose a Bike Helmet
  • What are Kask Protone and Giro Synthe
  • What Kask Protone and Giro Synthe Look Like
  • How are the Construction of Kask Protone and Giro Synthe
  • How are the Fitting System of Kask Protone and Giro Synthe
  • Are Kask Protone and Giro Synthe Comfortable
  • Kask Protone Vs Giro Synthe

Bike Helmet Safety

Safety gear is needed whenever we are using a vehicle because they are pretty risky depending on the type of vehicle itself including a bicycle. Riding a bicycle is probably just as risky as walking in a big city road, there is always a chance of you getting in something unexpected. When a certain thing happens, a bike helmet will help by adding a level of protection through the hard shell when taking an impact and with its foam to reduce the impact and spread it evenly in a wider area.

This system will reduce the chance of the impact affecting one spot greatly and lessen the chance of getting serious head and brain injury. Promoting helmet safety is great but pushing people to wear one is probably not because what we need is more cyclists on the road to increase their safety and this act may cause a reverse effect. 

Shopping for Bike Helmet

If you have no issue about wearing a bike helmet, it is always better safer than sorry and we advise to get the one made for the application because not all of us will do the same discipline or have the same preference.

  • Bike Helmet Sizing

Just like clothing, bike helmets are made in a certain sizing range to fit different head sizes and this should be considered if you never get one before or trying different brands. A good helmet should snug comfortably on the head but we will have different head shape and size thus, there is a measuring method by putting a measuring band around the temple about one inch above the eyebrow and match this number to helmet’s sizing which often available in S, M, L, and XL range.

  • Bike Helmet Type

Bike helmets also have types which are different for the main two disciplines; road riding and off-road riding. On road riding will commonly boast the comfort and vents because they need to be as breezy as possible to have decent air flow performance so the cyclist can ride faster but the off-road section is all about protection. Here we will get chunky helmets, full-face protection and huge visor to protect our eyes while climbing. Their helmets are also typically heavier and have additional safety features.

  • Bike Helmet Features

Just like everything else, features add the price of a helmet and commonly you will get various interesting features in a more expensive helmets. However, most of them are just the upgraded version of the standard system such as new MIPS or better air dynamic but you will see features like removable chin protection, sunglass slot, or even an option to adjust the arm of their rear retention panel to aid the best comfort.

Bell 4FortyGiro Chronicle
Product Dimensions15 x 10 x 8 inches
16 x 11 x 9 inches
Shipping Weight1.5 pounds
2.4 pounds
Best offerCheck priceCheck price

About Kask Protone and Giro Synthe

It is always best to get the one that fits your head size and preference the most because they must feel comfortable and ideally made for the certain riding application. There are lots of choices out there and while you can always pick from any brand, it is safer to go for the well-known names because we don’t have to worry about their quality and chances they will carry your option in the catalogue as well whether you ride on road only, mostly off-road or love both disciplines.

Among those many bike helmet manufacturers, Kask and Giro are two of the best options to go because these are the go-to for so many cyclists when looking for a new helmet. Both of them are very much popular in the market and if Kask is well-known for their amazing helmet and team up with Team Sky, the latter is often being our first choice when in for an affordable model yet, they also have higher-end options that are made to match certain applications.

If you are here then it means you often ride on the road and currently looking for a new helmet that can promote safety but also aid the cyclist performance and for this application, Kask Protone and Giro Synthe will be two of the most ideal models to consider. Both of them are very much similar to each other because they are made with the same goal in mind which is making you pedal faster but also feels at home with the helmet on top of the head.

Protone is probably one of the most popular road helmets by Kask and the fact that it was made together with Team Sky further imprint who should wear this model. Giro as its competitor has Synthe in their collection which is also highly praised for the same quality but if you are in for pricier and better aerodynamic, we do recommend getting Aether, one of the newest high-end model from the catalogue that you can check on our Kask Protone vs POC Ventral

Kask Protone and Giro Synthe Design

In term of shape, Kask Protone and Giro Synthe are a bit different side by side because if you check them closely, the latter is more flaring up on the side, making the helmet looks wider in comparison but flatter at the top, very much looking like a hat. Giro seems to like this design because their newer Aether also looks similar to this model. With Protone, it doesn’t sit too low and has a bit higher build or dome compared to Synthe.  

Protone just appears to be the chunkier option but once being worn, none of them will cause any funny look and aesthetic wise they are very attractive with different fashion options but if you like a subtle one, Synthe does combine shiny and matte finish while Protone has its surface polished shiny. For the weight they are not the lightest in the market for road helmets but they appear to be lightweight at 250 and 223 grams respectively.

Kask Protone and Giro Synthe Construction

Moving further, let’s see how Kask Protone and Giro Synthe are durable enough to offer a good safety level and on this side, all bike helmets will mostly be the same with polycarbonate shell and EPS foam liner inside to reduce impact and evenly distribute it to wider area. Synthe comes with MIPS but Kask has this MIT technology which is essentially an in-mold system to build the helmet. However, they do strengthen the inner frame to provide better mechanical strength and claimed to prevent the helmet from breaking into pieces.

When it is about durability, Kask is still better than Synthe because helmets at this price range usually fully cover the foam on the brim like Protone but you can still see some exposed areas here and it makes you concerned about how it will last being used and transported often. This decision is probably to reduce its weight because the helmet is indeed light yet, if it is scarifying durability, we do prefer the one with fully covered foam.

Kask Protone and Giro Synthe Fitting System

When it is about fitting system, Kask Protone and Giro Synthe is not lacking at all because you can get what mostly wanted on such system and here you can even adjust the fore and aft but, the one in the former helmet is not performing very good since it prone to not stay in place, making you have to readjust it from time to time. In addition only Synthe has the adjustable Y-buckle so it is difficult to get the strap evenly tensioned for some Protone users.

As for the rear fitting system, you will get the standard adjustment panel just like in most helmets but while Synth rotary knob is smaller, this model put it slightly below the helmet further and it is more comfortable compared to the closer one in Protone.

Kask Protone and Giro Synthe Comfort

The last point is their comfort and while in comparison Synthe is better to provide snugness with its fitting system, Protone is a decent helmet and this model also gives a very good air venting system to cool your head with its 20 windows. Synthe on the other hand has 26 of them and this is one of the reasons why you will feel breezier with this model. At higher speed, warming is not an issue but will become more noticeable at a slower pace.

Kask Protone vs Giro Synthe

There are lots of models to consider when getting a new helmet but they will highly depending on your taste and preference. In between these models, Synthe is lighter and more comfortable, as well as have better air ventilation to keep you ride with the best experience but, in terms of build quality, the heavier Protone does put more coverage on their foam to make the unit last longer.

- Handmade in Italy - crafted with the worlds finest materials and hours of pain staking hand work
- Wind tunnel tested - the protone boasts the lowest drag co-efficient of any ventilated helmet available
- All about fit - Kask octofit adjustment system guarantees a perfect fit
- Lightweight comfort - weighs just 230G and uses 3D Dry padding and eco-leather Chinstrap
- Featherweight Webbing with Slimline Buckle
- Roll Cage internal reinforcement
- In-Mold polycarbonate shell with EPS liner
- In-Mold polycarbonate shell with EPS liner/ Thermoformed SL Roll Cage reinforcement


All in all it is all up to your decision because we can’t go wrong with any of these helmets yet, in comparison we do favor Giro Synthe better thanks to its more vents, better fitting system, and slightly more affordable price.

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