Premium carbon construction meets true modular versatility. The HJC F100 Carbon is built for riders who want the coverage of a full-face helmet and the convenience of an open-face configuration in one streamlined design. Its advanced rotation system moves the chin bar to the rear of the shell, helping the helmet stay balanced and compact when opened.
A carbon fiber shell keeps weight low while HJC's wind-tunnel-developed shape helps reduce drag and lift. Add a generous internal sun shield, strong airflow, a secure visor lock, and speaker pockets, and the F100 Carbon is ready for commuting, touring, and long days in the saddle.
Why riders choose the F100 Carbon
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Carbon fiber shell: Delivers high strength with very low weight for a premium feel and reduced fatigue.
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Rotational modular design: Wear it in full-face or open-face configuration as conditions and stops change.
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Aerodynamic stability: The shell profile is optimized in HJC's wind tunnel to reduce drag and lift at speed.
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Adjustable internal sun shield: Extends up to 8 mm to improve coverage and help block low-angle sunlight.
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ACS ventilation: Three intake ports and five exhaust outlets move cool air through the helmet and help release heat.
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Improved defogging airflow: Enlarged front and mouth intakes direct fresh air toward the shield and breathing area.
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Compact visor mechanism: Supports smooth shield operation while keeping the helmet profile clean and balanced.
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Glove-friendly visor lock: Helps keep the shield securely sealed and reduces the chance of unwanted lift.
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3D contoured fit: Designed to feel secure and comfortable around the rider's head.
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Speaker pockets: Pre-molded recesses simplify installation of compatible Bluetooth speakers or an intercom system.
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DOT compliant: Meets or exceeds DOT FMVSS 218 requirements for on-road motorcycle helmets.
Feature and benefit guide
| Feature |
Rider benefit |
| Rear-rotating chin bar |
Converts quickly between full-face and open-face use while keeping the opened helmet compact. |
| Carbon fiber shell |
Combines impact-dispersing performance with an exceptionally light feel. |
| 3 intakes and 5 exhausts |
Promotes steady airflow and helps reduce heat buildup. |
| Adjustable sun shield |
Adds convenient glare protection with up to 8 mm of extra coverage. |
| Speaker pockets |
Provides a cleaner, more comfortable setup for compatible communication speakers. |
HJC helmet size chart
Measure around the widest part of your head, about 1 inch above your eyebrows. Use the chart as a starting point, then confirm the helmet fits snugly with even pressure and no painful hot spots.
| Size |
Head circumference |
Hat size |
| X-Small |
54 to 55 cm / 21 1/4 to 21 5/8 in |
6 3/4 to 6 7/8 |
| Small |
55 to 56 cm / 21 5/8 to 22 in |
6 7/8 to 7 |
| Medium |
57 to 58 cm / 22 1/4 to 22 7/8 in |
7 1/8 to 7 1/4 |
| Large |
58 to 59 cm / 23 1/4 to 23 5/8 in |
7 1/4 to 7 3/8 |
| X-Large |
60 to 61 cm / 23 5/8 to 24 in |
7 1/2 to 7 5/8 |
| 2X-Large |
62 to 63 cm / 24 3/8 to 24 3/4 in |
7 3/4 to 7 7/8 |
Fit note: A new helmet should feel snug around the crown and cheeks without creating sharp pressure points. Fasten the chin strap and check that the helmet moves the skin of your face when gently rotated. If it slides independently, try a smaller size.
Finish options
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Matte Black: A subdued carbon finish with a low-glare appearance.
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Gloss Black: A polished carbon finish that brings out the woven shell pattern.
Warranty
HJC covers manufacturing defects for up to 3 years from the purchase date or 5 years from the manufacturing date, whichever comes first. Warranty terms and eligibility are determined by HJC.
