Giro Ratio Helmet 2025
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Shipping Information
Shipping Information
To provide you with accurate shipping estimates, please note that there is a processing timeframe of 1-5 business days for online orders before they are shipped (Orders are shipped Monday-Friday). Our couriers provide estimated arrival times, which are based on the day your shipping label is created.
Note: Make sure the helmet fits with a little room when the fit system is loose, and sits low enough to protect your forehead without hindering your vision. Once you’ve got the right size, you can adjust the fit.
| ADULT SUPER FIT SIZE | CIRCUMFERENCE |
|---|---|
| S | 51 - 55 cm |
| M | 55 - 59 cm |
| L | 59 - 63 cm |
| XL | 63 - 65 cm |
| YOUTH SIZE | CIRCUMFERENCE |
|---|---|
| XS (Scamp Model) | 45 - 49 cm |
| S (Scamp Model) | 49 - 53 cm |
| XS (Dime Model) | 47 - 51 cm |
| S (Dime Model) | 51 - 55 cm |
| Universal Child | 47 - 54 cm |
| Universal Youth (Ages 5+) | 50 - 57 cm |
| ADULT SUPER FIT FULL FACE | CIRCUMFERENCE |
|---|---|
| S | 51 - 53 cm |
| M | 51 - 55 cm |
| L | 55 - 59 cm |
| XL | 59 - 63 cm |
| ADULT UNIVERSAL | CIRCUMFERENCE |
|---|---|
| Women Adult | 50 - 57 cm |
| Unisex | 54 - 61 cm |
| Extra Large | 58 - 65 cm |
Description
Description
From its In Form™ Fit System that lets you customize the fit to its adjustable venting that provides airflow when you need it, the Ratio™ helmet lets you make all the adjustments you need to stay comfortable on the mountain.
The Ratio™ is a no-nonsense helmet that boasts features found on premium helmets at a more accessible price. Beneath the sleek silhouette, you'll find the adjustability of an In Form fit system and Thermostat Control adjustable venting. Meanwhile, the Ratio helmet is also fully compatibility with aftermarket audio systems by Outdoor Tech so you can listen to your favorite tunes on the mountain.
Circumference: 55.5-59cm
Construction: Hard Shell construction, EPS foam liner
Ventilation: Thermostat Control™ adjustable venting - allows custom-tuning of airflow instantly with a simple, low-profile control button on the outside of the helmet, Stack Vent™ Technology
Fit System: In Form™ Fit System - easy to dial in a custom fit in seconds, even with gloves on. Ergo-friendly dial at the base of the helmet that provides up to 6cm of adjustment and enhanced stability
Product Weight: 590g (size Medium)
Electronics Compatibility: Compatible with aftermarket Giro audio systems by Outdoor Tech
Certification: CE EN1077
Highlights: Seamless Compatibility with all Giro goggles
Giro Helmet Size guide
Giro Helmet Size guide
Note: Make sure the helmet fits with a little room when the fit system is loose, and sits low enough to protect your forehead without hindering your vision. Once you’ve got the right size, you can adjust the fit.
| ADULT SUPER FIT SIZE | CIRCUMFERENCE |
|---|---|
| S | 51 - 55 cm |
| M | 55 - 59 cm |
| L | 59 - 63 cm |
| XL | 63 - 65 cm |
| YOUTH SIZE | CIRCUMFERENCE |
|---|---|
| XS (Scamp Model) | 45 - 49 cm |
| S (Scamp Model) | 49 - 53 cm |
| XS (Dime Model) | 47 - 51 cm |
| S (Dime Model) | 51 - 55 cm |
| Universal Child | 47 - 54 cm |
| Universal Youth (Ages 5+) | 50 - 57 cm |
| ADULT SUPER FIT FULL FACE | CIRCUMFERENCE |
|---|---|
| S | 51 - 53 cm |
| M | 51 - 55 cm |
| L | 55 - 59 cm |
| XL | 59 - 63 cm |
| ADULT UNIVERSAL | CIRCUMFERENCE |
|---|---|
| Women Adult | 50 - 57 cm |
| Unisex | 54 - 61 cm |
| Extra Large | 58 - 65 cm |
Payment methods
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Let customers speak for us
Good bike for the price. Best cost vs. Benefit
I ordered my Wilson clash 100 pro from Kunstadt. And received in 4 days. Very efficient.
Fast delivery, exactly what I wanted. The price was cheaper here.
I started skiing last year and jumped into these this season by recommendation from Kundstadt. They are absolutely wonderful to steer, not as rigid as the expert ones, and they give me excellent control, short stopping and turning capabilities, while letting me go as fast as I want. I tried other models renting and so far these are the best. I'm smiling in the picture.
I'd toppled over this morning and, well into my ride, realized I'd knocked my front brake cable out of its housing. I brought it into the Bank and Heron location and met Eric. He mended the brake, then went on to clean my very dirty chain, adjusted my rear brake and gear mechanisms and sold me some chain cleaning fluid - all in good humour and in short order. I flew home on my now very happy bicycle. THANKS, ERIC!
My son 18, who the skis are for has been sleeping with them since they have arrived! Too early to try but they look and feel good! Awesome graphic's, light weight.
Cheers, Brian
I've purchased two bikes from here, and had my bike, skis and tennis racquet serviced here. Nothing but great service and prices!
Best price I could find and super quick delivery. A++++ for Kunstadt
Great purchase! Love the look and feel of these classic Fischer boots! Kunstadt Sports was quick to respond to my inquiry and even quicker to ship out the merchandise - awesome transaction - thanks Kunstadt!
The jacket is perfect for the spring and summer.
Bonne qualité et très bon produit
Absolutely great company to deal with
I even was able to change the size after placing my order, real customer service
Most precise high performance boot I have ever skied. For a plug boot it is surprisingly comfortable. Body movements are transferred to the skis with precision and quickness.
This is probably the most comfortable ski boot that I have ever tried on! The design is superb!! I wish that I had tried the Fischer boot long ago. Better late than never!!
However, I need to try one size smaller to clarify that this is the boot that I can keep.
Good retention, transmission and responsiveness on a number of different snow conditions. Still a little difficult to get out of at the end of the day but does not freeze up with changing temperatures and wet 'powder' conditions.
