Bontrager Quantum Bike Helmet

The incredibly easy-to use Quantum bike helmet is your go-to lid no matter what type of riding you like to do thanks to great ventilation, excellent coverage, and Bontrager's signature comfort.

- In-mold composite skeleton increases helmet integrity and larger vent variations
- Fully-adjustable Micro-Manager fit system fits a wide range of head sizes
- Soft, comfortable, moisture-wicking, and washable helmet pads
- LockDown dividers make helmet strap management clean looking and easy to adjust
- Internal, recessed channels manage airflow through the helmet and over the head
- Removable snap-on visor with visor port plugs

- Small = 52-56cm
- Medium = 54-60cm
- Large = 58-64cm
- X-Large = 60-66cm