A versatile helmet with an improved design for greater comfort and an easy-to-adjust BOA® fastening system that gives you just what you need for your ride.
With ample protection, great looks and a secure fit, the Quantum is the perfect helmet for those who just want to ride. Featuring MIPS (Multi-directional Impact Protection - absorbing forces coming from different directions) technology, the helmet has excellent ventilation, making it an ideal choice for both trail and city riding.
Created by neurosurgeons and scientists, the MIPS (Multi-Directional Impact Absorbing Protection) head protection system helps minimize the impact of rotational forces that occur when the head is struck from different angles.
- MIPS Head Protection System.
- The BOA® wheel fastening system allows for easy one-handed helmet fit and adjustment.
- Shaped composite shell improves integrity and offers wider ventilation options.
- Cushions are soft and comfortable, moisture-wicking and washable.
- Internal vents take care of airflow around the head, dissipating excess heat and keeping it dry.
- Removable snap-on visor and vent plugs offer flexibility to fit your style.
- LockDown strap tabs allow easy adjustment of helmet straps.
Size (head circumference) Size S (51-57 cm), Size M (54-60 cm)
Our offer from BONTRAGER includes a very wide selection of cycling components such as panniers, blinkers, mudguards, bike computers, tubes, grips, cranks, baskets, bike bottles, pedals, handlebars, handlebars, saddles, seatposts, forks, tires, wraps, horns, protectors, stands, tangle wheels.
From working out of his garage in California in the early 80's, Keith Bontrager has evolved into a globally respected manufacturer of the finest cycling accessories and components. Keith's mantra was simple: first, durable, second, lightweight.
| Size | S | M | L | XL | XXL |
| Shoulders | 93-97 | 97-100 | 100-104 | 104-108 | 108-112 |
| Waist | 77-81 | 81-85 | 85-89 | 89-93 | 93-97 |
| Hipps | 93-97 | 97-100 | 100-104 | 104-108 | 108-112 |
| Size | XS | S | M | L | XL | XXL | XXXL |
| Chest | 84-89 | 89-94 | 96-102 | 104-109 | 112-117 | 119-124 | 127-132 |
| Waist | 68-74 | 74-79 | 81-84 | 89-94 | 97-104 | 106-114 | 114-122 |
| Hipps | 84-89 | 89-94 | 96-102 | 104-109 | 112-117 | 119-124 | 127-132 |
Men's
| EU | 40 | 40.5 | 41 | 41.5 | 42 | 42.5 | 43 | 43.5 | 44 | 44.5 | 45 | 45.5 | 46 | 46.5 | 47 | 48 | 49 |
| US | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | 13.5 | 14 | 14.5 | 15 |
| UK | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | 13.5 | 14 |
| CM | 25.7 | 26 | 26.3 | 26.7 | 27 | 27.3 | 27.7 | 28 | 28.3 | 28.7 | 29 | 29.3 | 29.7 | 30 | 30.3 | 31 | 31.7 |
| insert (cm) | 25.0 | 25.3 | 25.5 | 25.9 | 26.2 | 26.5 | 26.9 | 27.1 | 27.4 | 27.8 | 28.1 | 28.3 | 28.7 | 29.0 | 29.3 | 29.9 | 30.6 |
Women's
| EU | 36 | 37 | 37.5 | 38 | 38.5 | 39 | 39.5 | 40 | 40.5 | 41 | 41.5 | 42 | 42.5 | 43 |
| US | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 |
| UK | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 |
| CM | 23 | 23.7 | 24 | 24.3 | 24.7 | 25 | 25.3 | 25.7 | 26 | 26.3 | 26.7 | 27 | 27.3 | 27.7 |
| insert (cm) | 22.4 | 23.1 | 23.4 | 23.7 | 24.0 | 24.3 | 24.6 | 25.0 | 25.3 | 25.5 | 25.9 | 26.2 | 26.5 | 26.9 |
Men's
| Size | XS | S | M | L | XL |
| Hand circumference | 15-16,2 | 16,5-19 | 19-20,5 | 20,5-23 | 23-25,5 |
Women's
| Size | XS | S | M | L |
| Hand circumference | 14,5-15,5 | 15,5-16,5 | 16,5-19 | 19-20,5 |
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