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Bell 4Forty Air MIPS

Bell 4Forty Air MIPS
  • Color: Fasthouse Matte Gray/Black
  • Color: Matte Black
  • Color: Matte Black Camo
  • Color: Matte Blue/Hi-Viz
  • Color: Matte Gray/Red
  • Color: Matte Titanium/Charcoal
  • Color: Matte White/Black
Please select options


Equipped with pro-level technology but designed with the privateer in mind, the Bell 4Forty Air MIPS is the first choice for your next trail helmet.

Trail Life
The 4Forty Air MIPS is equipped with pro-level features designed with the privateer in mind. With a sleek new shell and 3-position visor, the benefits aren't just visibly rad but functionally significant for increased air ventilation, effective sweat management, and better goggle compatibility. Our Float Fit system, built-in Sweat Guide, and Ionic+ padding ensures all-day comfort, while Integrated MIPS and extended hard-shell coverage help you stay committed in all shred conditions. Upgrades like eyewear ports, a Fidlock magnetic buckle, and premium straps make the 4Forty Air MIPS your go-to for daily trail riding. [Availability, certification, color, and pricing may vary per region. If outside of the USA, please check with your authorized local dealer for more information.]

- INTEGRATED MIPS—Integrated MIPS (Multi-Directional Impact Protection System) is designed to reduce rotational forces that can result from certain impacts. By integrating the MIPS slip plane into the retention system, we are able to reduce complexity and weight for a compact, better ventilated helmet that fits more closely to the head.
- FLOAT FIT—A minimalist, lightweight fit system with an easy-to-turn rubber overmolded dial for adjustments (integrated with MIPS).
- FIDLOCK BUCKLE—Fidlock is an easy-to-use magnetic buckle. This time saving feature slides closed laterally for an effortless, secure fit.
- NO-TWIST TRI-GLIDES—Quick-adjust fasteners that help keep straps flat and properly positioned
- SWEAT GUIDE—Sweat Guide pad design pulls moisture away from the brow pad and away from eyewear.
- IONIC+ PADDING—Quick-drying interior padding helps manage sweat while fighting odor-causing bacteria.
- 3-POSITION ADJUSTABLE VISOR—3-position adjustable visor allows for sun protection and integrates easily with goggles or glasses.
- GOGGLE GRIPPER—Rubber grip on the back of the helmet keeps your goggle strap in place.
- EYEWEAR STORAGE—Easily stash your glasses using the integrated helmet notches.

Complies with the US CPSC Safety Standard for Bicycle Helmet for Persons Age 5 and Older

S 52-56 20 1/2"– 22" 6 1/2"– 7"
M 55-59 21 5/8"– 23 1/4" 6 7/8"– 7 3/8"
L 58-62 22 3/4"– 24 3/8" 7 1/4"– 7 3/4"
XL 61-65 24"– 25 5/8" 7 5/8"– 8 1/8"


Part Numbers

Option UPC MPN Store SKU
Fasthouse Matte Gray/Black / Small 196178094436 7151295 BEL26271382S
Fasthouse Matte Gray/Black / Medium 196178094443 7151296 BEL26235577M
Fasthouse Matte Gray/Black / Large 196178094450 7151297 BEL26214014L
Matte Black / Small 768686471933 7139320 BEL23234575S
Matte Black / Medium 768686471940 7139321 BEL23450196M
Matte Black / Large 768686471957 7139322 BEL23666281L
Matte Black / X-Large 768686471964 7139323 BEL24537511L
Matte Black Camo / Small 768686471834 7138534 BEL2684831S
Matte Black Camo / Medium 768686471841 7138535 BEL26295531M
Matte Black Camo / Large 768686471858 7138536 BEL26285648L
Matte Blue/Hi-Viz / Small 768686472039 7139340 BEL25503197S
Matte Blue/Hi-Viz / Medium 768686472046 7139341 BEL25309192M
Matte Blue/Hi-Viz / Large 768686472053 7139342 BEL25223680L
Matte Gray/Red / Small 768686471971 7139328 BEL27196739S
Matte Gray/Red / Medium 768686471988 7139329 BEL27548628M
Matte Gray/Red / Large 768686471995 7139330 BEL27512182L
Matte Titanium/Charcoal / Small 768686471896 7138564 BEL25852587S
Matte Titanium/Charcoal / Medium 768686471902 7138565 BEL25682795M
Matte Titanium/Charcoal / Large 768686471919 7138566 BEL2576843L
Matte Titanium/Charcoal / X-Large 768686471926 7138567 BEL26546526L
Matte White/Black / Small 768686472008 7139334 BEL25399652S
Matte White/Black / Medium 768686472015 7139335 BEL25427957M
Matte White/Black / Large 768686472022 7139336 BEL25519802L