Free Delivery over £30* | Free Click & Collect at Decathlon Stores | 365 Days to Return
Reference : 8524063
Add to my wish list
Product already added

B'TWIN 100 City Cycling Helmet Black

User rating
until £9.99 -%


This price includes a recycling fee for electrical equipment and batteries DecathlonDeeeTaxMentionAfterPrice / Since

From To

* Sales from to Until end of stock
* From and limited stock
£9.99 -%
This price includes a recycling fee for electrical equipment and batteries DecathlonDeeeTaxMentionAfterPrice / Since

* From To

* Sales from to Until end of stock
* From and limited stock
Check availability in store
We know you don't need to be told how important it is to wear your helmet, but if you've never really enjoyed strapping in and find them uncomfortable, this is the one for you. It's super comfortable and can be easily adapted to the shape of your head, plus has cushioning foam inserts and plenty of ventilation. Most importantly of all, it'll protect your head from impact.
  • It's easy to add a light
  • Ergonomic, personalised fit
  • Shields you from sun and rain

Technical Information


Complies with bike helmet standard EN 1078. European standard defining the test requirements and methods applicable to helmets used for skull protection when cycling around town and for skating, scootering and skateboarding. The corresponding test requirements and methods cover the following aspects: construction, including field of vision; shock absorption properties; characteristics of the restraint system and resistance to penetration.


S: 53-56
M: 55-59
L: 59-63
If you are between sizes, choose the larger size.
Choosing the right size helmet and getting the fit right is essential. For children, never buy a helmet that is too big on the assumption that they will grow.


For maximum protection, the helmet should be in close contact with your head and the fastening system must always be correctly adjusted, without being too tight around your forehead. When the straps are properly adjusted the helmet should not slide forward, back, or sideways. For this reason there are several sizes available. We recommend that you try on different sizes to find the best fit.


Size S: 240g
Size M: 250g
Size L: 324 g


This product has a hook for attaching a VIOO Clip, an LED light that can be clipped on anywhere and unclipped in an instant.
With a red or white light that can be used in continuous or flashing mode, you are clearly visible from up to 110m away. Accessories, such as mounted cameras, that have not been approved by the manufacturer may damage the helmet's features and affect its performance.


EPS liner: Expanded polystyrene
Outer shell: Polycarbonate


We recommend that you replace your helmet after 5 years starting from the manufacture date (shown on the label on the inside of the helmet).
As damage may not be visible, we recommend discarding and replacing any helmet that has suffered an impact
Using solvents or other aggressive products could affect your helmet's effectiveness.

See more See less

Composition / advice

100.00% Expanded Polystyrene (EPS)
100.00% Polycarbonate (PC)
100.00% Polypropylene (PP)
100.00% Polyoxymethylene (POM)
Stock advice Do not expose to high temperatures (over 50°C, particularly on your car's parcel shelf), and store in a dry place away from direct sunlight.
Restricted use : Not suitable for motorsports, aerial sports or mountaineering.
instructions To get more information about this product, please read instructions

Our commitments

The Pourquery laboratory, accredited by the COFRAC (French Accreditation Committee)
Guarantee : 2 Years

Product benefits

Impact protection Complies with EN 1078: field of vision, shock absorption, chin strap system, etc
Visibility Stay visible by clipping 1 light to the back of your helmet.
Anatomic design Free your head with the adjustment dial and adjustable straps.
Ventilation Get some fresh air with the 6 vents!
User comfort Pamper your head with the washable foam inserts.
Protection from the weather The "cap" shape protects you from the rain and sun so you can stay on track

your reviews

Reviews by our Team Members

Our customers pictures

your reviews

Our services

100 City Cycling Helmet Black
Maintenance and repair
Maintenance and repair
100 City Cycling Helmet Black
Because you look after your own health, we look after that of your products: tips for initial settings, maintenance and repair advice, video tutorials, FAQs, instructions...
See our tips