Bell Full-9 Fusion Mips Full Face MTB Helmet

Built to Send It!
Built on our legendary Full-9 platform, the Full-9 Fusion is our no-compromise full-face helmet for riders who hold nothing back. With a premium fiberglass shell, a wide field of view, Overbrow Ventilation intakes, a plush interior, and MIPS technology, this helmet delivers world-class quality, fit and features. It doesn’t matter if you are chasing the clock on a downhill run, or sending big gaps at your favorite bike park, if you are a rider who loves to shuttle to the top and then shred all the way down, this helmet is built for you.
Key Features:
- MIPS (Multi-Directional Impact Protection System) - A leading slip plane technology designed to reduce rotational forces that can result from certain impacts X-Static padding: Quick-drying materials, woven with real silver fibers, inhibit growth of odor-causing bacteria and fungi
- Overbrow Ventilation features intake ports on the brow of the helmet to usher in cool air and push it through the air-channel matrix for full-head ventilation
- Fiberglass shell
- Flying Bridge visor: Originally developed for moto use, this visor's side-mounted screws are easy to adjust, even while wearing gloves
- Breakaway screws
- Integrated breakaway camera mount requiring no zip ties or tape, designed to "break away" upon impact to reduce the risk of injury
- CPSC Bicycle
- ASTM F1952-00 (Downhill)
- ASTM F2032-06 (BMX)
Construction: Fusion In-Mold polycarbonate shell - A process pioneered by Bell bonds the helmet's outer shell to the EPS foam liner to create a sturdier helmet.
Fit System:
- Float Fit - A minimalist, lightweight fit system with an easy-to-turn rubber overmolded dial for adjustments (integrated with MIPS)
- No-Twist Tri-Glides: Quick-adjust fasteners that help keep straps flat and properly positioned
Weight: 1080 grams (size M)
Occasionally, without notice, manufacturers change product design and/or specifications.
Bell Full-9 Helmet Size Guide
|
Size |
Cm |
Inches |
|
XS/S |
51 – 53 |
20” – 20 7/8” |
|
M |
55 – 57 |
21 5/8” – 22 3/8” |
|
L |
57 - 59 |
22 3/8” – 23 ¼” |
|
XL/XXL |
59 - 63 |
23 ¼” - 24 ¾” |
How to measure
To find the circumference of your head, place a tape measure in the centre of your forehead, wrap it around above your ears and around the back of your head. If there's a slight difference between two different sizes, always go for the tighter size.
Once you know the circumference of your head, select a size with a range that your head size fits within.

As well as an adjustable chin strap the majority of cycling helmets have some form of adjustment for size, usually in the form of a ratchet adjuster to tighten or loosen the headband or replaceable pads of different thicknesses.
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