This SMK Allterra review looks at a thermoplastic motocross helmet with an adjustable peak and double-D retention. Its channelled ventilation and removable liner are relevant to off-road use, while goggle compatibility and the fit of the peak configuration need checking in person.
This is a specification-based buying guide, not a hands-on road test. We may earn a commission from purchases through our links, at no extra cost to you.
Peak adjustment and goggle fit
The multi-position peak is adjustable using the specified mechanism. Check the permitted settings and the clearance with your chosen goggles. The helmet has two shell sizes and multi-density EPS, but a correct fit still depends on even contact around your own head with the strap securely fastened.
Chin, front and top air intakes connect to channelled exhausts. Their presence does not establish how cool the helmet will feel during a particular ride. The liner can be removed and washed according to SMK instructions; inspect and refit the pads correctly before returning the helmet to use.
Protection and construction
The listed approval is ECE 22.06. Check the exact helmet label and specification for the version you are buying, particularly if you need it for a track event.
Fit and adjustment
The chin-strap fastening is Double-D. Make sure you are comfortable operating that fastening and adjusting it securely before choosing the helmet.
Comfort and everyday use
The interior is removable for cleaning. Follow the manufacturer’s care instructions and refit the pads in their original positions.
Versions and options
The checked listing links to these options: X-Sprint Grey / Orange / Black, Matt Black, Gloss White, X-Sprint Red / Black / White, X-Sprint Black / Anthracite / Grey, X-Sprint Black / Pink / White, X-Sprint Blue / Red / Black / White. Check the selected version and available sizes before ordering; the linked price may apply to a particular option.
See our motorcycle helmet reviews for more buying guides.
Related reading: SMK Gullwing Review.