SMK Allterra S01 X-Sprint Motocross Enduro Helmet GL231 – Black/White/Red

The SMK Allterra S01 X-Sprint Motocross Enduro Helmet GL231 is an off-road motocross/enduro motorcycle helmet from the brand SMK, X-Sprint graphics, in black/white/red. It is designed for motocross, enduro, and off-road riding and is ECE 22.06 approved.

Key Features

• ECE 22.06 homologation – compliance with the latest European safety standard.
• Thermoplastic shell – resistant, durable, and suitably lightweight.
• Double-D ring (DD ring) buckle for reliable and precise fastening.
• Removable and washable inner lining for greater comfort and hygiene.
• Off-road design with an extended visor and ventilation for motocross and enduro.
• Unisex design – suitable for men and women.

Technical Specifications

Size Chart

We recommend measuring your head circumference (at the widest part) to choose the most suitable size.

What does ECE 22.06 homologation mean?

ECE 22.06 is the current version of the international safety standard UN Regulation No. 22 for protective motorcycle helmets. Homologation confirms that the helmet type has been tested according to prescribed procedures and meets the required conditions regarding protection, construction, fastening system, field of vision, and other safety features.

The ECE 22.06 standard uses more demanding and extensive tests than the previous version ECE 22.05. Helmets are checked at different speeds and in multiple areas of the shell, which better evaluates their performance in various types of road and off-road accidents.

What is checked under the ECE 22.06 standard?

• Impact energy absorption – checking how much energy the helmet transfers to the head upon impact.
• Impacts at different speeds – the helmet is tested at multiple load levels, not just one speed.
• Multiple impact zones – different parts of the shell are tested, including additional randomly selected points.
• Oblique or rotational impacts – assessing the load that can cause rotational head movement.
• Shell and inner protective layer strength – checking the construction's ability to withstand prescribed loads.
• Helmet stability on the head – the helmet should not easily come off or slip from the head during an accident.
• Buckle and chin strap strength – the fastening system must remain closed and correctly positioned even under high loads.
• User's field of vision – the helmet's construction must not dangerously limit vision during riding.
• Safety of additional equipment – accessories and attachment points must not reduce the helmet's protective properties.