Giro Aether vs Synthe

Road bike helmets are designed to provide safety but also comfort, style, and some other benefits depending on what you are trying to achieve. Giro Aether Vs Synthe are an ideal choice for road cyclists to stay safe while pedaling but want to ride faster or more effectively as well. These models are fairly similar to each other and offer a good experience but slightly different and if you are currently choosing which will be the better choice, go check what they can offer below.

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

  • Do You Need an Aero Helmet
  • What are Giro Aether and Synthe
  • What Giro Aether and Synthe Look Like
  • How are the Construction of Giro Aether and Synthe
  • How are the Fitting System of Giro Aether and Synthe
  • How are the Ventilation of Giro Aether and Synthe
  • Giro Aether Vs Synthe

Aero Helmet

We always put safety first and no matter whether you are a motorist or a cyclist, a helmet will be a must because our head is exposed to a wide range of risk as we move faster on the vehicle. They are designed to reduce the impact and distribute the energy over a wider area so it will not be centered on one spot only while also reducing the risk of any critical injury to happen. As cycling also becomes a sport, speed is also an important part that we can’t separate from the activity.

Racing is a common event we take part in for various reasons including just for fun but we do serious when it is about performance and what we need is becoming faster. Bike helmets fortunately are also designed to make you faster and we call this type of helmet an aero model. They are made to minimize the air drag so the same power will produce faster movement since the rider will create less drag with the helmet shape.

In real-life however, there is no clear and credible information on how effective each design is for all of them are mostly created by manufacturers. Logically the design does play a role in making your ride faster with the same amount of effort but as outdoor trials happened, there must be some factors affecting the result as well. The common information is that a good aero will give you speed over 22-23 m/hr compared to regular road helmets where speed matters.

This may not be much of a difference but when you are riding to win and speed is a serious factor to maintain then getting small reduction in drag by getting an aero bike helmet will be a great choice to create your win. However, it is still not guaranteed for there may be other factors affecting the speed and experience. What you may want to pay attention to is these helmets may not be as comfortable as those made for regular long distance rides or daily commuting helmets.

First is because aero helmets tend to have less ventilations than common road helmets due to how they want to maintain the smooth design to create less drag thus, most of them are not as breezy for prolonged ride. In addition to higher price level, aero helmets are also heavier compared to your regular helmet in most cases, making them not very ideal if you are a cyclist who prefers to be as comfortable as possible and free from fatigue.

Giro AetherGiro Synthe
Product Dimensions13 x 10 x 8 inches15 x 10 x 8 inches
Shipping Weight1.4 pounds2.4 pounds
Best offerCheck priceCheck price

About Giro Aether and Synthe

At the end of the day you are the one who is going to decide whether the aero helmet will be a worthy investment or not since this is not something that all cyclists need to have. For those who are riding for speed whether it is just as a hobby or you will be competing, the price of an aero helmet will be shown into your performance. Today, as technology has improved so much, manufacturers are also showing lots of vented aero helmets to address traditional problems.

You can find aero helmets in almost any popular bike helmet brands out there which one of them is Giro. We are sure most cyclists are familiar with this American company because of how popular they are and the reason why we choose this brand is because they seem to always have the option for any budget level. We tend to check their collection first when looking for affordable helmets like Giro Sonnet Vs Savant but their higher range is much better.

Giro has been designing aero helmets for a while now and not long ago they also have a new model to offer with some bells and whistles. If you are interested in reducing air drag but still want to be comfortable, Giro Aether and Synthe will be a nice choices to consider. These are two of the most popular models from the company but also two of the most loved in the market for this category with the former being a new addition in 2018.

Synthe itself has been reigning as a go-to for racing helmets since quite some time being the option of so many cyclists because this model is offering all the qualities we want in a good bike helmet including comfort and adjustability. Aether is following this step by being claimed as a better version of its older brother. What’s surprising is this model is not actually being designed as an aero helmet at first but has the quality and if any, this one is actually more of a highly ventilated road helmet.

Giro Aether and Synthe Design

The reason why many are confused about which to choose between Giro Aether and Synthe is probably because they are made to be similar to each other as well with a rounder top and flatter dome as well as a little flaring to the outer side but in comparison you will see the latter is featured with less chunky design especially when you pay attention to those thick straight lines they are made with. However, overall they are very much similar to each other.

The reason why Aether is claimed to have better aero quality than Synthe is probably because of its wider surface. Side by side they are not looking like most traditional racing helmets but they sit well on most heads, creating a fashionable look with a wide variety of colors to choose from. Weight wise, none of them are the lightest helmet nor is a heavier model in the spectrum but the former indeed slightly bulkier at 330 grams over 312 grams Synthe in their large version.

Giro Aether and Synthe Construction 

Moving further, let’s talk about their construction, durability, and safety quality since this is the first thing we always pay attention to when checking a new helmet. As an expensive model, Giro Aether and Synthe are indeed built to be very durable but there is nothing special about the material since just like any common helmets, the outer shell is made from polyester material while the lining inside are made from polystyrene or EPS foam. The polyester is also covering most of the foam unless on some parts of the brim.

Expensive helmets usually have MIPS or similar additional protection and this is the same with any of these helmets. What’s different is that Aether is coming with a new design called MIPS Spherical inspired by their own skiing helmets. This technology is made up of independent inner and outer shells which are held together by rubberized strings. The almost spherical interface between these two shells will allow them to slide independently to replicate the slip-plane function of traditional MIPS but without using the plastic liner inside.

Giro Aether and Synthe Fitting System

The next part we want to talk about is the adjustment and here is what shines the most about Giro Aether and Synthe in our opinion because they are among the best in the market for they can offer a very wide range of adjustment with Roc Loc Air Fit system which carries a full circumference and will accommodate a wide range of head size and shape. In addition they are also coming with adjustable Y buckles that are fed through the EPS foam liner.

The male snap lock strap length is adjustable and in most cases they will sit below the chin but for some users with oval o

r more elongated head shape where the distance between helmet and the strap is further, this snap lock may not sit properly on the center.

Giro Aether and Synthe Ventilation

The last point that matters here is their ventilation and here is what Aether will show you why this model is called as it is because it is among the best in the market when it comes for cooling the head just slightly below Airnet. This is thanks to its bigger ventilation to enhance the airflow to make sure your head is always cool. In comparison to Synthe, this model is also a breeze but is not as good as Aether and will noticeably become warmer as you slow down.

Giro Aether vs Synthe

Both of these helmets are a great choice for aero and comfortable riding; anything of your preference. The prominent difference is that Aether will breezier in comparison, slightly heavier than Synthe, and coming with more advanced safety technology. Other than these, you will be satisfied with either of them for they are equally comfortable to ride with.

- MARKET-LEADING PROTECTION: Engineered in Giro’s category-leading helmet test lab
- UNPARALLELED AIRFLOW: With deep internal channeling and massive vents
- EYEWEAR STORAGE: Dedicated eyewear grippers for storing sunglasses when not in use
- LIGHTWEIGHT AND PROGRESSIVE LAYERING: 6-piece shell with in-mold construction. Two densities of EPS foam manage a wide range of impact energy
- Featherweight Webbing with Slimline Buckle
- Roll Cage internal reinforcement
- In-Mold polycarbonate shell with EPS liner
- The Synthe is the pinnacle of road helmet design, combining the performance gains of an aerodynamic profle and light weight with great cooling power to enhance rider comfort and effciency in road rides and races.


All in all the decision is all yours because there is no bad choice between the two yet, if you are into the higher performance and higher cooling effect, we will definitely recommend the new Giro Aether.


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