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4Forty MIPS Mountain Biking Helmet


Product image 1Bell 4Forty MIPS Protective Mountain Biking Helmet in Copper/Black Side
Product image 2Bell 4Forty MIPS Protective Mountain Biking Helmet in Copper/Black Side
Product image 3Bell 4Forty MIPS Protective Mountain Biking Helmet in Copper/Black Side
Product image 4Bell 4Forty MIPS Protective Mountain Biking Helmet in Copper/Black Top
Product image 5Bell 4Forty MIPS Protective Mountain Biking Helmet in Copper/Black Rear

Regular price £53.21 Sale price £89.99

Mountain biking is a demanding sport. Compromises and shortcuts when it comes to gear are never a good idea. The Bell 4Forty MIPS®️ is built to withstand the rigours 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 the option of integrated MIPS®️ protection.

Boasting the comfort, protection and capable features of helmets costing twice as much, the 4Forty is an all-conditions, all-kinds of trail champion.

Bell has designed the 4Forty to be an all-day trail luxury, 15 vents provide an excellent cooling over the prow helping reduce sweaty pads, combined with sweat Guide padding means less time wiping salt out of your eyes and more time nailing the trails.

The retention and fit are comprised of Bells Float Fit systems giving 4 rear dial positions transitioning smoothly into the plastic cradle. Integrated into the 4Forty is MIPS®️ protection, a new modern standard in helmet safety.

MIPS®️ Protection

MIPS stands for "Multi-directional Impact Protection System", which is a leading slip-plane technology inside the helmet designed to reduce rotational forces that can result from certain impacts.

Highlights and Features

  • Float Fit™
  • 15 air vents
  • Fusion In-Mold Polycarbonate Shell
  • Goggleguide™ Adjustable Visor System
  • MIPS®️-Equipped
  • No-Twist Tri-Glides™
  • Sweat Guide™ Padding
  • Cert: CPSC Bicycle, CE EN1078
  • Weight: 380 grams

Bell 4Forty Size Guide

Size Head Circumference
Small 52 - 56 cm 18.11 - 22.04"
Medium 55 - 59 cm 18.89 - 22.83"
Large 58 - 62 cm 23.22 - 24.40"
XL 61 - 65 cm 24.01 - 25.19"

If you’re unsure of your head circumference you can wrap a measuring tape around your head whilst keeping the tape just above the ears and level front to back to find your measurement or come on down into store for fitting advice.


Free Delivery

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We're able to ship orders placed before 3pm on weekdays that same day when upgraded to either our DPD Next Day or DPD Saturday Delivery, otherwise delivery is FREE on orders over £40 with our economy delivery option, we aim to ship orders placed before 10am on weekdays that same day with delivery expected within four working days.

Tracking is provided upon dispatch and you can opt for order updates to be sent to you via Facebook Messenger if you would prefer this.

Please see our Delivery Information page for further details.


  • Economy Delivery
    Delivery typically within four working days
    FREE on orders over £40 otherwise £1.95
    Fully tracked and may require a signature
  • Next Day Delivery
    Delivery next working day
    Order before 15:00 for same day shipping
    £2.95 per order
    Mainland UK only
  • Saturday Delivery
    £8.95 per order
    Available until 15:00 on Friday
    Mainland UK only
  • Freight Delivery
    FREE on orders over £500
    £29.95 on orders under £500
    Order before 12:00 for same day shipping
    Delivery typically the next working day
    Mainland UK only

Free Returns

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We want you to be 100% happy with your purchase from us here at Scotby Cycles which us why we’re one of only two or three bike shops (and as far as we're aware the only independent bike shop) which offer free returns on all accessories and clothing.

If an item doesn't fit, or isn't quite what you expected then simply email with your order ID and ask for a returns number, once approved we’ll provide you with a free Royal Mail Tracked label so you can send us your returns completely free of charge from any Post Office branch within 30 days of purchase.

Please see our returns policy for full details.


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