Cycling helmet Bell 4Forty Air MIPS - Matte Black

The 4Forty Air MIPS helmet is built to withstand the rigors of off-road riding and rugged trails. Its quality is equal to helmets that cost twice as much: it has a deep profile covering the back of the head, is perfectly ventilated, fits perfectly on the head thanks to the Float Fit clamping system and has an adjustable visor. With MIPS technology, which provides increased protection against rotational forces on the head. More

3 999 Kč
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Basic informations

Category Cycling MTB helmets
Determination men's, women's
Brand Bell
Catalog number 39280-255

Technical parameters

Helmet size S-(52-56), M-(55-59), L-(58-62)
Color black
Construction In-mold Polycarbonate Shell, MIPS
Season 2026
Execution peak
Advanced level racing, sporty
Buildable size adjustable
Other three-position label, Fidlock magnetic buckle, Ionic+ antibacterial lining, Sweat Guide, sunglasses port, Float Fit fastening system
Sizes S (52–56 cm), M (55–59 cm), L (58–62 cm)
Weight 360 g
Ventilation 14 holes, Channeled Ventilation
Certification CE EN1078

Product description

The 4Forty Air MIPS helmet is packed with technical features, is well made and offers plenty of safety features. The modern design, complete with an adjustable visor, is also adapted to MX glasses. We also focused on perfect ventilation and sweat wicking with a special Sweat Guide lining with Ionic+ antibacterial treatment. The Float Fit clamping system with integrated MIPS system guarantees all-day comfort. Of course, there is a sunglasses port or a magnetic buckle Fidlock.

MIPS (Multi-Directional Impact Protection System) provides increased protection against rotational forces on the head. More atMIPSprilby.cz">www.MIPSprilby.cz.

Main advantages and specifications

  • SUPPORT SYSTEM: Float Fit (MIPS integration)
  • CONSTRUCTION: In-mold Polycarbonate Shell
  • VENTILATION: 14 holes, Channeled Ventilation
  • FEATURES: Three-position visor, Fidlock magnetic buckle, Ionic+ antibacterial lining, , Sweat Guide, sunglass port
  • SIZE: S (52-56 cm), M (55-59 cm), L (58-62 cm)

MIPS - Multi-Directional Impact Protection System

MIPS is a slip liner between the EPS shell (helmet body) and the inner liners. In the event of an angled impact, the EPS shell of the helmet will roll a few millimetres over the MIPS layer, protecting the head and brain from the violent rotational jerk.
Although this movement is only on the order of a few millimeters, the result is that MIPS significantly reduces the amount of rotational force that might otherwise be transmitted to the brain.

Technology:

  • FLOAT FIT™ (Stratus, Catalyst, Formula, Drifter, Super 3R, Super 3, 4Forty and Hela) Minimalist clamping system that is easy to operate with a wheel. It also has the option of height adjustment.

  • FUSION IN-MOLD POLYCARBONATE SHELL Technology of direct injection of EPS polystyrene foam into the shell and reinforcements enclosed in the mould. This way a very strong, durable and compact unit is achieved. Bell's original technology, which has become the standard.

Size chart

Size chart

About brand Bell

Specialist in bicycle helmets with a tradition since 1956.

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