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Verdict: 
Great to see MIPS at this price but it could do with better ventilation and comfort
Weight: 
273g

The Giro Isode helmet incorporates the latest MIPS technology, which is good to see at this price, and I also like that Giro has included a bug mesh in the front vents. The downsides are that the ventilation is average and it feels heavier than it is. A bit of a mixed bag then.

  • Pros: Roc Loc cradle easy to adjust, bug mesh
  • Cons: Feels heavy, average ventilation

The Giro has gone for a one-size-fits-all design for the Isode, covering head circumferences from 54cm to 61cm, and I reckon it's this that makes it feel heavier than it actually is. I have a 56cm head so with the cradle wound in to suit, it just feels like there is a lot of helmet unsupported hanging over the back of my head (it's not me in the photos, by the way).

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It feels top heavy in a weird way. I was testing this alongside the Bell Formula MIPS helmet, which was actually 11g heavier at 282g, but it felt so much lighter in use than the Isode.

Giro Isode MIPS helmet - side 2.jpg

The padding that comes with the Isode is quite thick as well, and quite soft, which makes it feel like the helmet is kind of squished on. If you back off the tension on the cradle to alleviate it, then the helmet becomes too loose.

I wouldn't say that the Giro is uncomfortable, but it does have quite a few compromises in the fit – for me anyway; a helmet's fit is a very personal thing after all.

Giro Isode MIPS helmet - back.jpg

The Isode has 22 vents in various positions but for some reason they don't translate to a particularly impressive amount of ventilation. Whether that is down to their size or position is unclear, although it is most likely a mixture of the two.

Giro Isode MIPS helmet - side.jpg

As the temperature has been dropping off to the low teens centigrade it's done a better job of keeping my head cool, but push the effort and your head will get sweaty.

One nice addition is the bug mesh behind the front five vents. If you've ever been stung by an irate wasp trapped in your helmet then you'll know it isn't a pleasant experience – especially if you are trying to deal with traffic all around you. This simple solution makes a big difference to riding in the summer and it's a mystery why more manufacturers don't include it.

Giro Isode MIPS helmet - inside.jpg

You may have seen the initials MIPS added to the name of various helmets over the last year or so, and if you don't know what it is then let me fill you in. In a crash your head is subject to two types of forces, lateral and rotational. MIPS stands for Multi-directional Impact Protection System and the little yellow tabs that you see between cradle and helmet allow some 'give' – a slip plane if you like, to reduce those rotational forces.

> All you need to know about MIPS

It's being used in all kinds of safety equipment and it's good to see it becoming available on helmets lower in the price range.

And that brings us nicely on to value...

Against some on the market the Giro is quite a sensibly priced helmet, but going back to that Bell I mentioned earlier it's surprising how much more you can get for your money. The Bell is £84.99 compared to the Giro's £69.99, but for that extra £15 the Bell is an all-round better package. It feels lighter, too, and looks more expensive than it is.

> Buyer's Guide: Cycling helmets – everything you need to know

Performance-wise, I'd put the Giro on a par with the Specialized Align; they feel the same weight when you wear them side by side, too. True, the Spesh doesn't have the MIPS, but it is just 30 quid.

Overall, it's not a bad helmet from Giro, but it's overshadowed by others of a similar price.

Verdict

Great to see MIPS at this price but it could do with better ventilation and comfort

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road.cc test report

Make and model: Giro Isode MIPS helmet

Size tested: Medium

Tell us what the product is for and who it's aimed at. What do the manufacturers say about it? How does that compare to your own feelings about it?

Giro says, "Sometimes the smartest designs also are the simplest. The Isode™ MIPS® is an easy fit for riders who want classic style with the latest features, yet don't want to spend a fortune or compromise comfort. The Isode includes several features found in our premium helmets, like In-Mold construction to keep the weight low and the easy one-handed adjustments of our acclaimed Roc Loc® Sport MIPS system, for a sure fit at the turn of a dial. It's the perfect companion for your riding, no matter how fast or how far you ride."

It's not a bad helmet but lacks the refinement of some others on the market at this price.

Tell us some more about the technical aspects of the product?

FEATURES:

Quick-dry padding

Compact shape

Full Hardbody coverage

Reflectivity

CONSTRUCTION:

In-mold polycarbonate shell with EPS liner

FIT SYSTEM:

Roc Loc Sport

VENTILATION:

22 vents

UNIVERSAL FIT SIZES:

UA 21.25' - 24' / 54 - 61cm

Rate the product for quality of construction:
 
8/10
Rate the product for performance:
 
6/10
Rate the product for durability:
 
8/10
Rate the product for weight (if applicable)
 
7/10

Not massively heavy, but it felt weightier than it is.

Rate the product for comfort (if applicable)
 
7/10
Rate the product for value:
 
6/10

Tell us how the product performed overall when used for its designed purpose

It is pretty average across the board at achieving what a helmet should do.

Tell us what you particularly liked about the product

MIPS technology at a good price.

Tell us what you particularly disliked about the product

Poor ventilation and, for me at least, it feels heavy.

How does the price compare to that of similar products in the market, including ones recently tested on road.cc?

It's a good price for a MIPS-equipped helmet but it lacks on the basics compared to some of the similarly and cheaper priced helmets, like the Specialized I mention in the review.

Did you enjoy using the product? I've got others that I prefer to wear.

Would you consider buying the product? No

Would you recommend the product to a friend? No

Use this box to explain your overall score

On the whole I found the Giro to be quite a basic helmet for the money, apart from the MIPS. There are some much better helmets out there for a similar price that offer more ventilation and, for me, a better fit.

Overall rating: 6/10

About the tester

Age: 40  Height: 180cm  Weight: 76kg

I usually ride: This month's test bike  My best bike is: B'Twin Ultra CF draped in the latest bling test components

I've been riding for: Over 20 years  I ride: Every day  I would class myself as: Expert

I regularly do the following types of riding: time trialling, commuting, club rides, sportives, fixed/singlespeed

Stu knocked out his first road.cc review back in 2009 and since then he's chucked the best part of seventy test bikes around the West Country, a couple of them quite literally! With three alloy and two steel bikes in his fleet he's definitely a metal man (that'll be the engineering background) but is slowly warming to that modern carbon fibre stuff along with fat tyres & disc brakes.
It's not all nostalgia though, after spending the last few years in product design Stu keeps banging on about how 3D printing is going to be the next big thing and he's a sucker for a beautiful paint job too.