O’Neal Sierra II Mens Full-Face Slingshot Helmet

O’Neal Sierra II Mens Full-Face Slingshot Helmet


O’NEAL is a renowned brand that specializes in producing top-quality motorcycle and cycle gear, parts, apparel, and accessories. With almost 40 years of racing experience, O’NEAL is committed to providing riders with the utmost comfort, quality, and protection every time they hit the road.

Product Features

Shell Construction

The O’Neal Sierra II helmet is constructed with ABS, ensuring durability and strength. The shell’s weight is 1590g, with a tolerance of 50g, making it lightweight and comfortable for extended use.

Comfortable Interior

The helmet features a moisture-wicking, removable, and washable air-channelling comfort liner. This liner helps to keep your head cool and dry, even during long rides. Say goodbye to sweaty and uncomfortable helmets!

Optimal Ventilation

Vent holes are strategically placed on the helmet to provide optimal ventilation. This ensures proper airflow, keeping you cool and refreshed throughout your journey.

Integrated Face Shield

The O’Neal Sierra II helmet comes with an integrated face shield, offering protection against wind, dust, and debris. The shield can be easily adjusted to your preferred height, providing a clear and unobstructed view of the road ahead.

Safety Features

The helmet is equipped with a padded chin strap that includes a double-D safety lock. This ensures a secure and snug fit, minimizing the risk of the helmet coming off during an accident. The O’Neal Sierra II helmet meets the safety standards set by DOT and ECE 22.05, guaranteeing your protection on the road.

Versatile Design

Designed for various riding styles, including street, enduro, side by side, and adventure bikes, the O’Neal Sierra II helmet is a versatile choice for riders of all kinds. No matter your preferred riding style, this helmet has got you covered.

Replacement Parts

O’NEAL understands that accidents happen, and parts may need to be replaced. With the Sierra II helmet, you can easily find and purchase replacement parts, ensuring the longevity of your helmet.

Frequently Asked Questions

1. Is the O’Neal Sierra II helmet suitable for all head sizes?

Yes, the helmet is available in various sizes to accommodate different head sizes. Make sure to measure your head circumference accurately and refer to the size chart provided by O’NEAL to select the right size for you.

2. Can I use the O’Neal Sierra II helmet for off-road riding?

While the helmet is primarily designed for street, enduro, side by side, and adventure bikes, it can also be used for light off-road riding. However, for intense off-road activities, we recommend using a helmet specifically designed for that purpose.

3. How do I clean the comfort liner?

The comfort liner of the O’Neal Sierra II helmet is removable and washable. Simply follow the instructions provided by O’NEAL to remove the liner and clean it with mild soap and water. Allow it to air dry completely before reattaching it to the helmet.


The O’Neal Sierra II Mens Full-Face Slingshot Helmet is a top-of-the-line product that offers exceptional comfort, quality, and protection. With its durable shell construction, moisture-wicking comfort liner, optimal ventilation, and integrated face shield, this helmet is designed to enhance your riding experience. Whether you’re cruising on the streets or embarking on an adventurous journey, the O’Neal Sierra II helmet is the perfect companion for every rider. Trust O’NEAL’s decades of racing expertise and choose the Sierra II helmet for your next ride. Stay safe and enjoy the thrill of the road!