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Item Condition: This is a new item that is missing the original packaging, or the packaging has been opened. Tags, manuals, or installation instructions may be missing, however the item is fully functional. - MFG: 05/2026
O'Neal Sierra II Helmet
O'Neal Sierra II Helmet, featuring polycarbonate/ABS construction, is designed for more aggressive adventure riding and varying terrain. The Sierra II Helmet includes an integrated face shield and a shorter peak visor for more diverse functionality.
Features:
- Polycarbonate/ABS Shell construction
- Moisture wicking, removable/washable air channeled comfort liner
- Vent holes for optimal ventilation
- Integrated face shield
- Height adjustable helmet shield
- Padded chin strap with double-d safety lock
- Meets DOT safety standards
| Product Style | RevZilla Item # | Store Sku | MFR. Product # | Availability |
|---|---|---|---|---|
| Product Style Black/Grey / XL | RevZilla Item #10632701 | Store Sku | MFR. Product #2525986 | AvailabilityOnly 1 Left: Ships within 24 hours |
O'Neal Helmet Sizing
| Helmet Size | Head Measurement (cm) |
|---|---|
| XS | 53-54 |
| SM | 55-56 |
| MD | 57-58 |
| LG | 59-60 |
| XL | 61-62 |
| 2XL | 63-64 |
| 3XL | 65-66 |
Sizing information is provided by the manufacturer and does not guarantee a perfect fit.
How to Measure
-
H Head
Wrap a cloth measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, repeat for good measure and use the largest measurement.
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