Bell MX-9 MIPS Twitch Helmet
We covered all the details on the MX-9, loading it with a tough polycarbonate shell, Mips energy management system, an adjustable visor, Velocity Flow ventilation, and a removable, washable, anti-microbial liner for when the time comes to hose down. The MX-9 Mips packs all these features into one helmet, delivering exceptional value and pro-caliber performance.
CONSTRUCTION:- INTEGRATED ROOST GUARD
- FULLY ADJUSTABLE FLYING BRIDGE VISOR WITH AIR INTAKE VENTS
- VELOCITY FLOW VENTILATION SYSTEM FOR MAXIMUM COOLING
- 3 SHELL AND EPS SIZES FOR A PERSONALIZED FIT
- 1533G +/- 50G (SIZE M)
- DOT (US)
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Sizing Information
| Size | Head (inches) | Head (cm) | Hat Size |
| XS | 20 7/8 – 21 5/8 | 53-54cm | 6 5/8 – 6 3/4 |
| Small | 21 5/8 – 22 | 55-56cm | 6 7/8 – 7 |
| Medium | 22 1/2 – 22 3/4 | 57-58cm | 7 1/8 – 7 1/4 |
| Large | 22 3/4 – 23 1/4 | 59-60cm | 7 1/4 – 7 3/8 |
| XL | 23 5/8 – 24 | 61-62cm | 7 1/2 – 7 5/8 |
| XXL | 24 1/2 – 24 3/4 | 63-64cm | 7 3/4 – 7 7/8 |
| XXXL | 25 5/8 – 26 | 65-66cm | 8 1/8 – 8 1/4 |
This sizing chart is based on information provided to us by Bell Helmets and is subject to change without notice, although we will do our very best to keep it up to date. We recommend that you measure your head by wrapping a cloth tape measure around your head about 1 inch or 2.5 cm above your eyebrows, which should be the largest portion of your head. Choose the helmet that is closest to your measured head size. If you fall between two sizes, choose the smaller of the two. You want a helmet to fit snug without being uncomfortable.
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