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The trails are calling, and the dread of the berms, corners and tough terrain no longer strike fear in your heart thanks to the ultimate protection of the Bell 4forty MTB Helmet.
The trails are calling, and the dread of the berms, corners and tough terrain no longer strike fear in your heart thanks to the ultimate protection of the Bell 4forty MTB Helmet.
Bell

Bell 4Forty MIPS Mountain Bike Helmet - Cliffhanger Grey/Yellow

£109.99
Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined

Bell 4Forty MIPS Mountain Bike Helmet - Cliffhanger Grey/Yellow

Season:SP25

Brand:Bell

Code:35355-086

The trails are calling, and the dread of the berms, corners and tough terrain no longer strike fear in your heart thanks to the ultimate protection of the Bell 4forty MTB Helmet.

Built for the Trail – Maximum Protection & Comfort

Mountain biking demands tough, high-performance gear, and the Bell 4Forty MIPS Mountain Bike Helmet delivers. Designed to withstand the rigors of aggressive trail riding, this helmet offers premium protection, ventilation, and comfort, all at an unbeatable value.

MIPS Evolve Protection for Superior Safety

The optional MIPS Evolve system (Multi-directional Impact Protection System) helps reduce rotational forces in the event of a crash, providing advanced head protection on technical descents and rough terrain.

Optimised Comfort & Ventilation

  • Float Fit System – Adjustable, lightweight fit system for all-day comfort.
  • Sweat Guide Technology – Wicks moisture away from your eyes to keep your vision clear.
  • Extended Rear Coverage – Extra protection for the back of the head on challenging trails.
  • Generous Ventilation – Keeps you cool and comfortable, even on tough climbs.

All-Terrain, All-Conditions MTB Helmet

  • Adjustable Visor – Customisable for optimal sun and goggle compatibility.
  • Full Hard-Shell Construction – Enhanced durability for long-term use.
  • Lightweight Design – Offers a bantamweight feel with heavyweight protection.

Unbeatable Value for Trail Riders

Offering the same high-performance features found in helmets twice the price, the Bell 4Forty MIPS Helmet is the ultimate all-mountain, all-conditions companion for riders who demand durability, ventilation, and top-tier protection.

Technical Information
  • Certifications:
    CE EN1078
  • Vents:
    15
  • Rotational Energy Management:
    MIPS Evolve (integrated fit system)
  • Construction:
    Fusion In-Mould Polycarbonate Shell
  • Fit System:
    Float Fit (integrated with MIPS)
  • Other Tech & Features:
    Adjustable Visor
    No-Twist Tri-Glides
    Sweat Guide
  • Weight:
    363g (size M)
Sizing Information

Helmet Size Guide

How to measure your size – Wrap a measuring tape around your head, keeping the tape level from front to back. Note the measurement and reference the Size Guide. Note: Make sure the helmet fits with a little room when the fit system is loose, and sits low enough to protect your forehead without hindering your vision. Once you’ve got the right size, you can adjust the fit. SOME MIPS® LOW-FRICTION LAYERS, ALONG WITH OTHER PARTS OF A HELMET, MIGHT CAUSE LACERATIONS TO THE WEARER’S HEAD/FACE IN SOME ACCIDENTS. THIS MIGHT OCCUR DUE TO THE HIGH PRESSURE ON THE SCALP FROM THE IMPACT OR AS A BY-PRODUCT OF THE LOW-FRICTION LAYER’S MOVEMENT IN CERTAIN ANGLED IMPACTS TO HELP REDUCE THE ROTATIONAL ENERGIES TO THE HEAD.

Helmet SizecminchesHat Size (inches)
S52 - 56cm20 1/2 – 226 1/2 - 7
M55 - 59cm21 5/8 - 23 1/46 7/8 - 7 3/8
L58 - 62cm22 3/4 - 24 3/87 1/4 - 7 3/4
XL61 - 65cm24 - 25 5/87 5/8 - 8 1/8
Professional Opinion
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