Quantum helmets feature superior ventilation, excellent coverage, and Bontrager's signature out-of-the-box comfort. A removable visor feature adds incredible ease-of-use by allowing Quantum to be your go-to helmet no matter what the type of ride.

MIPS, "Multi-directional Impact Protection System," sets a new standard in helmet safety. Developed by brain surgeons and scientists, MIPS helps reduce rotational forces on the brain caused by angled impacts to the head.

- Equipped with MIPS Brain Protection System
- In-mold composite skeleton increases helmet integrity and larger vent variations
- Intuitive, one-handed Headmaster fit system adjusts height and circumference
- Soft, comfortable, moisture-wicking, and washable helmet pads
- Internal, recessed channels manage airflow through the helmet and over the head
- Removable snap-on visor with visor port plugs

- Small = 51-57cm
- Medium = 54-60cm
- Large = 58-63cm
- X-Large = 60-66cm