4Forty MIPS Protective Mountain Biking Helmet in Retina Sear


Product image 1Bell 4Forty MIPS Protective Mountain Biking Helmet in Retina Sear Side
Product image 2Bell 4Forty MIPS Protective Mountain Biking Helmet in Retina Sear Side
Product image 3Bell 4Forty MIPS Protective Mountain Biking Helmet in Retina Sear Side
Product image 4Bell 4Forty MIPS Protective Mountain Biking Helmet in Retina Sear Top
Product image 5Bell 4Forty MIPS Protective Mountain Biking Helmet in Retina Sear Back

Regular price £54.99 Sale price £89.99

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 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.

But what is 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. MIPS low-friction layer.”

380 grams

15 vents

CPSC Bicycle, CE EN1078


  • Float Fit™
  • Fusion In-Mold Polycarbonate Shell
  • Goggleguide™ Adjustable Visor System
  • MIPS®️-Equipped
  • No-Twist Tri-Glides™
  • Sweat Guide™ Padding

Bell 4Forty MIPS 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 (Select Colours) 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 aim to dispatch economy delivery orders within one working day but if you need something a bit quicker we offer next day delivery from just £2.95 and we'll dispatch that same day if ordered before 3pm.

Otherwise, delivery is FREE on orders over £50 (excl. Bikes, see below) within the United Kingdom via Royal Mail Tracked 48. Tracking is provided upon dispatch and you can opt for order updates to be sent to you via Facebook Messenger if you prefer that over email.

Next Day Delivery

We’ve partnered with DPD for our next day deliveries including their industry leading DPD Predict and Follow My Parcel services so you can find out exactly where your order is and approximately when it will be delivered.

On the morning of delivery, you will receive either an email or text message from DPD with the name of your driver, an hour slot for delivery and a range of 'In-Flight' options such as;

  • Select an alternative delivery date
  • Opt for delivery to a nominated neighbour
  • Have the parcel left in a specified safe place
  • Upgrade delivery to before 10:30, before 12, afternoon or a Saturday or Sunday

These options can be managed either via the DPD Local website using your tracking reference or via the Your DPD app available for free from the App Store and Google Play. Fees may apply for some alterations which are paid directly to DPD Group.

Remote Zone Delivery

Our economy service (Royal Mail Tracked 48) covers the whole of the United Kingdom as is FREE on orders over £50, however, unfortunately, we're unable to provide express services to customers in Northern Ireland, Isle of Man, Scottish Highlands nor any other offshore isle, please avoid purchasing these services at the checkout.

Delivery of Bikes

Delivery is FREE within England and Wales on bikes (or orders containing bikes) over £500, customers located in the Scotland Highlands, Northern Ireland and other offshore isles may possibly be surcharged for delivery depending on the exact location.

All our bikes are delivered pre-assembled, setup and safety checked by our workshop, shipped in custom-made bike boxes allowing them to be despatched requiring just a few tweaks from you upon receiving the bike such as fitting pedals.

We aim to ship all our bikes that same day if ordered before lunchtime on during weekdays and our delivery estimate is usually the following working day.

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 complete our returns form (details of which will be included with your order) and 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 28-days of purchase.

Please see our returns policy for full details.


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