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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:

  • Shell is constructed from ABS
  • 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 and ECE 22.05 safety standards
  • Designed for Street, Enduro, Side by Side and Adventure riding
Product Style RevZilla Item # Store Sku MFR. Product # Availability
Product Style Flat Black / XS RevZilla Item #1223674 Store Sku660206 MFR. Product #0817-501 AvailabilityIn Stock: Ships within 24 hours
Product Style Flat Black / SM RevZilla Item #1223675 Store Sku660207 MFR. Product #0817-502 AvailabilityIn Stock: Ships within 24 hours
Product Style Flat Black / MD RevZilla Item #1223676 Store Sku660208 MFR. Product #0817-503 AvailabilityIn Stock: Ships within 24 hours
Product Style Flat Black / LG RevZilla Item #1223677 Store Sku660209 MFR. Product #0817-504 AvailabilityAvailable: Ships in 5-7 business days
Product Style Flat Black / XL RevZilla Item #1223678 Store Sku660210 MFR. Product #0817-505 AvailabilityAvailable: Ships in 5-7 business days
Product Style Flat Black / 2XL RevZilla Item #1223679 Store Sku660211 MFR. Product #0817-506 AvailabilityIn Stock: Ships within 24 hours
Product Style Flat White / XS RevZilla Item #1223680 Store Sku660212 MFR. Product #0817-511 AvailabilityAvailable: Ships in 5-7 business days
Product Style Flat White / SM RevZilla Item #1223681 Store Sku660213 MFR. Product #0817-512 AvailabilityAvailable: Ships in 5-7 business days
Product Style Flat White / MD RevZilla Item #1223682 Store Sku660214 MFR. Product #0817-513 AvailabilityAvailable: Ships in 5-7 business days
Product Style Flat White / LG RevZilla Item #1223683 Store Sku660215 MFR. Product #0817-514 AvailabilityAvailable: Ships in 5-7 business days
Product Style Flat White / XL RevZilla Item #1223684 Store Sku660216 MFR. Product #0817-515 AvailabilityAvailable: Ships in 5-7 business days
Product Style Flat White / 2XL RevZilla Item #1223685 Store Sku660217 MFR. Product #0817-516 AvailabilityAvailable: Ships in 5-7 business days

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.
Product Description
Part Numbers
Sizing & Fit
55 Customer Reviews
55 4.5/5
33 Questions & 29 Answers
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