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Road Cycling Helmet Aerofit 900

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Sale price: 340 SAR

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Our engineers have created a comfortable, lightweight, aerodynamic helmet that ventilates the cyclist's head to improve the body's thermoregulation.

Helmet designed for road cyclists or cross-country mountain bikers looking for an aerodynamic, well-ventilated helmet that's very light and durable thanks to the use of In-Mold moulding technology.

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Sale price: 340 SAR

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Product Features

A photo of the Road Cycling Helmet Aerofit 900 in use


The helmet's grille and inner channels facilitate continuous air flow.


Ultra-light helmet thanks to its In-Mold moulding construction and compact size.

Easy dressing

Full turn-ring system fully covers the head ensuring fast, precise adjustment.


Developed in a wind tunnel, thereby minimising its drag coefficient (Cx).

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Product Reviews

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1760 reviews

Road Cycling Helmet Aerofit 900
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R900 helmet

Really nice helmet but sizes super small. Measured head and went medium but, at 57cm needed large. Not a criticism of the helmet just the size.

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Bang for buck, under rated.

Excellent road hat for an excellent price, adjustment at the back very similar to Lazer mips hats and works well though I'd prefer some "click" feel. Weight also brilliant for the price, doesn't come with a huge box and loads of unnecessary plastic baggies and manuals like most hats do, so kudos for being responsible. As far as comfort goes I literally forget it's there - so that's 11/10. The only thing it's missing to make a really nice touch is adjustable straps around the ears (as they are glued to the plastic guide) but other than that the fit is perfect, it vents well and as a basic upgrade the aero difference is noticeable when you're up to speed.

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Sturdy, light and stylish

Another excellent product of van rysel

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Good purchase

Very nice, light bike helmet, fits well and it's easy to adjust on my square head

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Decent helmet

Can’t fault it

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Perfect Fit for me/good quality

Supposed to be this is for my wife but coz it's really fit and perfect for me so I am the one who's using it and love it, very's looks like great quality and amazing price. I wish I could get some discount for the next purchasing.

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very small fit

helmet looked nice and of good quality. however the sizing was very inaccurate it fitted like a Childs helmet I am a 56 size and ordered medium. item returned......!!!

Great helmet

Great product would recommend to anyone looking for top a Quality helmet without the massive price tag

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Excellent Value

This has got great venting, looks aero and more expensive than it is. Padding is comfortable. Only one very slight niggle, the strap can be difficult to adjust properly, but not impossible. The size came up a little small for me so I would double check sizing before ordering. Overall I would highly recommend this helmet. Great work Decathlon! Cheers.


I find these really comfortable.

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Van Rysel Road Cycling Helmet

This helmet did its job when I came off my bike and my head slammed into the kerb. There was a significant dent in the helmet, but I was unharmed apart from a few aches and pains for a few days afterwards. Replaced the helmet with the same one as I know I can trust it - but I don't recommend testing it like I did!!

Van Rysel Road Cycling Helmet

I only had the helmet about 1 month before it was tested in an accident. When I came off the bike, my head slammed against the kerb. There was a significant dent in the helmet, but my head was still intact. The helmet did what it was designed to do, and probably saved my life. It will be replaced with another, identical helmet as I am happy with the way it performed.


The items I bought were Very good quality but having problems at the till very slow

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Not a great fit

It fits more like a child's helmet. Had to return and bought a much better fitting giro helmet.

Careful on sizing

So I took all the sizing comments on here with a pinch of salt as in my experience usually, this is people who cannot measure their heads properly. My head is 58cm this puts bang in the middle of the stated large sizing. I very nearly ordered online but when I realised the delivery times were so long and I noticed the large helmet I wanted was in stock in a local decathlon I decided to buy in person, I am glad I did! The large size helmet on my 58 cm head did fit but it was perched more on top of my head than around it so there was no protection to my forehead area at all and whilst some cyclists seem to think wearing a helmet on the back of your head exposing your forehead is correct, it is not! same as a helmet is too small, a helmet is supposed to cover as much area as possible both at the front and the rear of your skull. Luckily there was an xl helmet in the store and this fitted almost perfectly although as other people of said the helmet does seem to have a very round profile so there are slight gaps on the sides but for me, it was close enough. This XL helmet is allegedly for 59 - 62 cm this is total nonsense, I highly recommend you try this helmet on before you buy, visit a store if you can do so. On the positive side for £40 this seems to be a very well constructed, quality, not bad looking helmet on par with the big brands at a fraction of the price, as people have said there is some moaning about no being able to adjust the straps in the "triangle" or ear area, in my opinion, this is nonsense if you are wearing the helmet properly i.e. on your head covering the forehead area and not on the back of your head like a goon this area won't need adjusting in 99% of all cases. would be a 5-star helmet if decathlon actually did something about the sizing, it's not like no one has told them the last couple of years or so!

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Additional Product informations



  • 100% Expanded Polystyrene

Racket T joint

  • 100% Polycarbonate

Board fin

  • 100% Polyoxymethylene

Brake lever

  • 100% Polypropylene


size M = 55-57cmsize L = 57-59cmsize XL = 59-62cm


Size M: 255 gSize L: 260 gSize XL: 300 g


We have designed the helmet's inner ventilation to maximise thermal regulation of the head using the "jet" effect generated by air inflows through the grill, 16 inner channels and extractor.

In-mold moulding technology and eps

The In-Mold moulding technology used in manufacturing this helmet makes it possible to mould the external polycarbonate shell during the expanded polystyrene (EPS) injection stage. This results in a structure that is much stiffer, very durable, and extremely light. The inner EPS structure absorbs the energy generated during an impact so that it is not transmitted to the skull, while the stiff external shell provides the helmet with longer-lasting durability.

Return policy for personal protection equipment products.

Make sure that this product fits properly.If it doesn't please return or exchange it per our return policy. Please return it with the instructions, labels, and any original packaging, so that it can be reconditioned. Let's take care of our planet, together.

What does the en 1078 standard cover?

Complies with standard EN 1078 for bikes, inline skates and skateboards.EN1078 is a European standard regarding testing methods and requirements for "cycling, skateboarding, and skating" helmets.This standard covers the following aspects: construction, including field of vision, shock absorption properties, retention system features including the chinstrap and tightening devices, and marking and information.

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