O'NEAL Sonus Full Face Helmet V.21

This item / size combination is out of stock. Please contact the store as more may be on order. You can call 01935 431937 or email us here.
SML 55-56CM
Part Number:




Safe, robust and stylish in design - the SONUS MTB helmet is your first choice for action on the bike. No matter what terrain it takes you: With this helmet from O'NEAL you rely on a high-quality product!

The SONUS helmet not only looks good, but also offers you everything you need on the bike with numerous features:
• Robust shell made of ABS
• Optimal cooling & ventilation
• Practical Fidlock® magnetic closure & much more!
Rely on a mountainbike helmet that supports you in every situation.

O'NEAL - your expert for mountainbike & more for 50 years

    ABS shell: The shell of this O'NEAL helmet is made of rugged and lightweight ABS.
  • Ventilation & Cooling: Multiple vents ensure that you keep cool even during long sessions thanks to optimal ventilation.
  • Long-lasting design: Multicolored graphics give this O'NEAL helmet its sporty look and stay with you for a long time thanks to the best technology.
  • Ultra-plush padding: Dri-LEX® padded lining with Polygiene® antibacterial treatment is removable, sweat-absorbing & washable.
  • Fidlock® magnetic buckle: The O'NEAL Fidlock® magnetic buckle allows one-handed opening & closing with maximum safety while riding.
  • Airflaps™ compatible: For more ventilation under goggles and helmet: With this O'NEAL helmet you can easily combine your Airflaps™.
  • High, standardized safety: This O'NEAL mountainbike helmet exceeds the EN1078 safety standard for bicycle helmets.
Standard EN1078

Locking sytem O`Neal Fidlock® magnetic closure

Ventilation system - multiple airvents

Replaceable visor - Yes

Airflaps compatibility - Yes

More reasons to buy from us

We price match all products on a like for like basis.

To qualify the item must be available in stock with a UK supplier and any additional costs taken into consideration.

i.e delivery charges, buyers premium, assembly charges.

Call us on 01823 252499 before you make your purchase to enquire about price matching a product.

Please read our full price match policy.

With all bike sales you will receive an informational bike pack that contains a 15% Off accessories voucher inside.

This voucher is redeemable at your nearest Bicycle Chain, Rock & Road or Climb On Bikes Store.

We currently have stores in Yeovil, Taunton, Bridgwater, Weston-Super-Mare and Hereford.

This is part of our 'Support Local Business' initiative, where we want to see local riders supported by their local bike shops.

We hope to see you in store soon.

When you buy a bike from us in the store or come to collect your Click & Collect order we will adjust your new bike to fit you.

This includes adjusting saddle height, saddle position and where possible adjusting the brake levers / gear shifters.

We will also adjust any accessories you have purchased with your bike where applicable.

When you buy a bike from us you will get a free service at your nearest store within 6 weeks of taking delivery of your bike.

The free service is put in place to make sure the bike you have purchased is running correctly and to adjust out any cable stretch that happens to any new bike.

The type of bike you have bought and the type of riding you have planned will affect how soon you need to book your free service.

  • Light use - 6 weeks
  • Daily commuting / moderate use - 4 weeks
  • Hard / aggressive use - After the first 2 rides

However if you experience any issues at any time you should stop riding your bike and book your bike in for its free service immediately.

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  • Sunday: Closed