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4Forty MIPS 4Forty MIPS 4Forty MIPS 4Forty MIPS 4Forty MIPS 4Forty MIPS
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4Forty MIPS

STYLE #: 100000000500000068
$124.95
Color - White
Size Size Guide
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All-mountain value — optional Mips Evolve, Float Fit, Sweat Guide, adjustable visor, full hard shell — the 4Forty is ready for anything the trail throws your way.
Mountain biking is a demanding sport — compromises and shortcuts when it comes to gear are never a good idea. The 4Forty Mips is built to withstand the rigors of a trail-riding life; with generous ventilation, the comfort of Float Fit and built-in Sweat Guide, extended rear coverage, a full hard shell, adjustable visor, and Mips Evolve protection. Boasting the comfort, protection, and broadly capable features of helmets costing twice as much, the 4Forty Mips is a bantamweight, all-conditions, all-kinds-of-trail champion packing a heavyweight value. [Availability, certification, color, and pricing may vary per region. If outside of the USA, please check with your authorized local dealer for more information.]
  • MIPS® EVOLVE — Mips Evolve 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®).
  • ADJUSTABLE VISOR — Adjustable visor allows for sun protection and easy goggle storage.
  • 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.
  • GOGGLE GRIPPER — Rubber grip on the back of the helmet keeps your goggle strap in place.
Complies with the US CPSC Safety Standard for Bicycle Helmet for Persons Age 5 and Older,380g (Size M)
Woman on MTB wearing white 4forty MIPS
Woman wearing 4forty MIPS helmet

Helmet Size Guide

How to Measure Your Head
Helmet Sizing

  1. 1. Use a soft tape

    Flexible measuring tape or string plus a ruler.

  2. 2. Wrap above brows

    About 1 in (2.5 cm) above eyebrows, level and snug.

  3. 3. Measure twice

    Use the larger of two readings.

Size Chart Reference
Size Head (in) Hat Cheek (mm)
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