Bell 5Fifty Spherical: New trail helmet features motorsport technology and maximum ventilation

Protective gear is becoming increasingly important to mountain bikers. Knee pads are now virtually standard. Even on local trails, you now see more and more riders kitted out with lightweight chest and back protectors. This is a good thing, as the risk of injury is rising in line with ever-more-powerful bikes and increasingly challenging trails. Bell has responded to this trend with the completely redesigned 5Fifty Spherical. This high-end open-face helmet is designed for ambitious trail, all-mountain and enduro riders who prioritise a high level of safety and all-day comfort.

​Conclusion from the editor’s perspective

More protection is always better than less – especially as MTB trails are becoming increasingly challenging. With the 5Fifty Spherical Bell is therefore definitely heading in the right direction. As well as comprehensive certification, the helmet also offers additional rotational protection – that’s brilliant. Unfortunately, the sophisticated Spherical system has a significant impact on the weight: 500 grams for an open-face helmet? In my view, that’s clearly too much and unnecessarily compromises comfort.
The 5Fifty’s range of features, on the other hand, is incredibly extensive, and the ventilation system sounds promising. However, only a practical test can reveal just how well it actually works in everyday use. Given all the features, the price does seem reasonable, but 260 euros is still a fair bit of money. Stefan Frey, BIKE editor

Visually, the helmet immediately stands out thanks to its angular, aggressive lines. Bell has deliberately taken its cue from modern gravity bikes and motorsport designs. The aim was to develop a helmet that not only protects the rider but also delivers the best possible performance on long trails and challenging descents.

Greater protection against twisting thanks to Spherical Technology

At the heart of the security concept lies the well-known Spherical Technology, which Bell developed in collaboration with Mips. Unlike traditional Mips solutions, the system features a design comprising two helmet shells. In the event of an oblique impact, the outer shell can move relative to the inner shell, thereby reducing rotational forces before they are transferred to the head.

In addition to its improved anti-rotation protection, the new 5Fifty meets safety standards CPSC and CE EN1078 and thus goes beyond the standard certification.

Ventilation modelled on motorsport

A key development objective was to ensure effective cooling of the helmet. To achieve this, Bell uses a motorsport-inspired Dual Flow Ventilation System. Air is channelled through a system of internal ducts via large intake vents and actively directed over the head. At the same time, this is designed to create a diffuser effect that draws warm air out of the helmet.

Greater comfort on long journeys

Bell also offers a wide range of features to ensure comfort. The new Float Race Fit System It offers three adjustment options: height, padding width and circumference tension. This is designed to allow the helmet to be adjusted with particular precision to suit different head shapes.

In addition, a new system has been introduced which is designed to channel sweat away from the forehead and goggles, preventing it from running into the eyes whilst descending. The Ionic+ padding dries quickly and uses silver ions to control odours.

Practical features for everyday trail riding

As well as safety and ventilation, Bell has incorporated a range of practical features. These include:

• Fidlock magnetic clasp for quick opening and closing
• Triple-adjustable visor
• Space for safe storage of goggles
• Quick-release mount for a camera or light

Bell 5Fifty Spherical – Details & Price

• Spherical Technology powered by MIPS
• Double-shell construction to reduce rotational forces
• Dual-flow ventilation system with a motorsport-inspired air diffuser
• Float Race Fit System with triple adjustment
• Sweat Guide: Sweat Management
• Ionic+ interior upholstery with odour control
• Fidlock magnetic clasp
• Triple-adjustable visor
• Camera and lighting set-up
• Certification: CPSC, CE EN1078
• Sizes: S: 52–56 cm / M: 55–59 cm / L: 58–62 cm
• Weight: 500 grams (L; manufacturer’s specification)
• Price: 259.99 euros >> available here

Conclusion from the editor’s perspective

With the 5Fifty Spherical, Bell is launching a helmet that incorporates many of the latest developments in the trail and enduro segments. The combination of MIPS-based Spherical Technology, sophisticated ventilation and a wide range of comfort features is clearly aimed at riders who spend many hours off-road.
The ventilation concept, featuring a motorsport-style diffuser, looks particularly interesting, as it is designed to combine high cooling performance with generous protection coverage. Added to this are modern details such as a Fidlock fastening, goggle compatibility and the adjustable Float Race Fit system. Stefan Frey, BIKE editor