ONeal Sonus Split Full Face MTB Helmet
Get on the bike and focus on the ride – your O’NEAL Sonus Split Full Face MTB helmet will keep you safe and comfortable. With optimal ventilation and other strong functions, the SONUS offers perfect support in every situation: You’re in the market for an MTB helmet that supports you on any terrain while offering a maximum of safety, comfort, and function? Look no further than the O’NEAL SONUS. As one of the leading MTB experts O’NEAL supplies professional gear to athletes all over the world.
Key Features:
- Shell is constructed from sturdy ABS
- Multiple air vents for optimal ventilation and cooling
- Ultra-plush removable, sweat absorbing and washable padded inner liner
- O'Neal Fidlock® magnetic buckle (engineered in Germany) for easy, single-handed fastening and release, provides maximum security while riding
- Goggles rest securely in place on ridge at back of shell
- Optional available plastic break-away visor screws for improved safety
- Height adjustable visor
- Airflaps™ compatible
- Exceeds EN1078 safety standard for bicycle Helmets
50 Years Faster – Choose O’NEAL and rely on a true mountain bike professional
O’NEAL has been your partner for MTB equipment for more than 50 years, providing high-quality engineering and technical innovation as well as uncompromising safety. The SONUS is your strong companion on the bike.
Occasionally, without notice, manufacturers change product design and/or specifications.
O'Neal Helmet Size Guide
How to measure
To find the circumference of your head, place a tape measure in the centre of your forehead, wrap it around above your ears and around the back of your head. If there's a slight difference between two different sizes, always go for the tighter size.
Full Face Helmets
Adult sizing
Size |
XS |
S |
M |
L |
XL |
XXL |
(cm) |
53/54 |
55/56 |
57/58 |
59/60 |
61/62 |
63/64 |
Youth
Size |
M |
L |
(cm) |
48/50 |
51/52 |
Open Face Helmets
Thunderball
|
Adults |
|
Youth |
Size |
XXS - S |
M - XL |
XXS - S |
(cm) |
52-57 |
57-61 |
52-56 |
Defender – Adults
size |
S - M |
L - XL |
(cm) |
54-58 |
58-61 |
Pike – Adults
size |
S / M |
L / XL |
(cm) |
55-58 |
58-61 |
Q RL – Adults
size |
XS - M |
L - XL |
(cm) |
53-58 |
58-63 |
Orbiter – Adults
size |
XS - S |
M - L |
XL - XXL |
(cm) |
53-56 |
57-60 |
61-64 |
Dirt Lid
|
Adults |
|
Youth |
|
|
size |
M - L |
L - XL |
S |
M |
L |
(cm) |
55-59 |
58-61 |
47-48 |
49-50 |
51-52 |
Trailfinder – Adults
size |
S - M |
L - XL |
(cm) |
54-58 |
59-63 |
Rooky – Teenagers
size |
XXS |
(cm) |
51-56 |
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No longer available
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