The HJC F100 gives touring riders the flexibility of a modular helmet with a clean, aerodynamic profile. Its rotational chinbar moves smoothly from a full face setup to an open face configuration, while the Advanced Fiberglass Composite shell balances strength, comfort, and reduced weight. A wide shield, integrated sun shield, and efficient ventilation help keep every ride clear and comfortable.
Key Features
- Advanced Fiberglass Composite shell for a comfortable, secure fit
- Rotational chinbar allows full face and open face riding configurations
- Meets DOT FMVSS 218 safety standards
- ACS ventilation moves air from front to back through two intake vents and one exhaust vent
- Pinlock ready HJ 45 face shield provides 99 percent UV protection and a scratch resistant surface
- Integrated HJ V12 dark smoke sun shield offers convenient glare protection
- Moisture wicking interior helps keep the helmet comfortable during longer rides
- Crown liner and cheek pads are removable and washable
- Three dimensional contour cheek pads and glasses grooves improve everyday comfort
- Secure Double D ring retention system
- Pinlock lens, chin curtain, and breath deflector included
Shield Fitment
Sizes X Small, Small, and Medium use the HJ 45A shield. Sizes Large, X Large, and 2X Large use the HJ 45B shield.
Helmet Sizing
- X Small fits 54 to 55 cm
- Small fits 55 to 56 cm
- Medium fits 57 to 58 cm
- Large fits 58 to 59 cm
- X Large fits 60 to 61 cm
- 2X Large fits 62 to 63 cm
For the best fit, measure around the widest part of your head just above the eyebrows and compare the result with the size range above.
Before You Select a Size: Helmet-Fit Facts
A helmet is one of the most important pieces of riding gear you will choose, and the size printed on the label is only a starting point. Head circumference, head shape, crown contact, cheek-pad pressure and the retention system all affect whether a helmet fits correctly. Two helmets marked the same size can fit very differently—even within the same brand.
- Measure around the widest part of your head, keeping the tape level and approximately one inch above your eyebrows.
- A new helmet should feel evenly snug around the entire head without sharp or painful pressure points.
- When you move the helmet gently from side to side, your skin should move with the liner rather than the helmet sliding independently.
- Fasten the retention system and confirm that the helmet cannot roll forward or lift off the head.
- Wear the helmet for several minutes before deciding. Comfort padding may settle with use, but an incorrect shell shape or painful pressure point is unlikely to be solved by choosing blindly.
Why Come to Eagle Leather for a Helmet Fitting?
Our staff is trained to help with helmet fitting and can help you compare head shape, size, pressure points and retention across different models. Inventory changes daily, but Eagle Leather consistently carries many hundreds of helmets—often approaching 1,000 units—across half-shell, open-face, modular, adventure and full-face styles. That selection gives you the opportunity to compare brands and internal shapes instead of relying on a size label alone.
For such an important piece of riding gear, we encourage you to visit Eagle Leather for an in-person fitting before selecting a size without trying the helmet on.
