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Bell

Bell 4Forty Air MIPS Mountain Bike Helmet - White

$129.95 $229.99
43% off
Size
Color: Matte White

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Description

The Bell 4Forty Air MIPS is a trail mountain bike helmet with Mips Evolve rotational protection built into its Float Fit dial system, extended rear coverage and a 3-position visor that tucks up over goggles. The 4Forty Air MIPS weighs 360 g in size M, closes with a Fidlock magnetic buckle, and we stock it in Matte White, sizes M and L.

What it is

A half-shell mountain bike helmet made for trail riding, the kind you put on for a quick after-work loop and forget about until you are back at the trailhead. The shell reaches well down the back of your head, the vents move air through on the climbs, and the visor lifts high enough to park your goggles underneath it on the way down.

Who it's for

Trail riders who want one helmet for everything from a dusty summer lap of Nerang State Forest to a wet day in Derby or a long morning at Stromlo. If you ride with glasses, the eyewear notches hold them when you take them off on a climb; if you ride with goggles, the rubber Goggle Gripper at the back stops the strap sliding.

Sizing: M fits heads of 55-59 cm and L fits 58-62 cm. Measure with a soft tape about 2.5 cm above your eyebrows, keeping it level and snug, and take the larger of two readings. If you land between sizes, go up a size and let the Float Fit dial take up the slack.

Key details

  • Mips Evolve: the Mips slip plane sits inside the retention system, designed to reduce the rotational forces that some impacts produce, while cutting weight and bulk and helping airflow
  • Float Fit: a light cradle with an easy-to-turn, rubber-covered dial
  • Fidlock magnetic buckle: slides closed sideways in one easy movement
  • No-Twist Tri-Glides: keep the straps lying flat and in the right place
  • 3-position visor: down for sun, up for goggles or glasses
  • Sweat Guide brow pad and Ionic+ padding: steer sweat away from your eyes and eyewear, and dry quickly between rides
  • Weight: 360 g (size M)

Looking after it

Rinse the pads in cool water after a sweaty ride and let the helmet dry in the shade rather than baking in the sun. A helmet is built to protect you in one crash: replace the 4Forty Air MIPS after any impact hard enough to mark it, even if it looks fine.

Specifications
  • Type
    Trail mountain bike helmet
  • Weight
    360 g (Size M)
  • Head circumference
    M - 55-59 cm; L - 58-62 cm

Sizing Guide

Additional Information
  • Mips Evolve slip plane built into the fit system
  • Float Fit dial retention with a rubber-covered dial
  • Fidlock magnetic buckle and No-Twist Tri-Glides
  • 3-position visor that clears goggles
  • Goggle Gripper at the back and eyewear storage notches
  • Sweat Guide brow pad and quick-drying Ionic+ padding
  • 360 g in size M
  • Matte White, sizes M (55-59 cm) and L (58-62 cm)

FAQ's

What size Bell 4Forty Air MIPS do I need?
The Bell 4Forty Air MIPS in size M fits heads of 55-59 cm and size L fits 58-62 cm. Measure about 2.5 cm above your eyebrows; if you are between sizes, go up a size and tighten the Float Fit dial.

Does the Bell 4Forty Air MIPS work with goggles?
Yes. The Bell 4Forty Air MIPS has a 3-position visor that lifts high enough to park goggles underneath, and a rubber Goggle Gripper on the back that keeps the goggle strap from sliding off.

How much does the Bell 4Forty Air MIPS weigh?
The Bell 4Forty Air MIPS weighs 360 g in size M. Integrating the Mips slip plane into the Float Fit retention system is part of how Bell keep the weight and bulk down.

What is Mips Evolve on the Bell 4Forty Air MIPS?
Mips Evolve on the Bell 4Forty Air MIPS is a Mips slip plane built into the helmet's retention system. It is designed to reduce the rotational forces that can result from certain impacts, and building it into the fit system keeps the helmet compact.

Where do sunglasses go on the Bell 4Forty Air MIPS?
The Bell 4Forty Air MIPS has eyewear notches built into the shell, so you can slide your glasses into the helmet on a hot climb and put them back on for the descent.

What buckle does the Bell 4Forty Air MIPS use?
The Bell 4Forty Air MIPS closes with a Fidlock magnetic buckle that slides closed sideways in one easy movement, and No-Twist Tri-Glides keep the straps flat under your ears.

Should I replace my Bell 4Forty Air MIPS after a crash?
Yes. Replace the Bell 4Forty Air MIPS after any crash where your head hit the ground, even if the shell looks fine. The foam inside is designed to crush once to absorb an impact.