Rounder, Smoother, Stronger Shells
WHAT THE R75 SPECIFICATION MEANS TO YOU:
Arai believes the primary purpose of a helmet is to deal with the impact energy of actual, unpredictable crashes, not just lab tests.
In an actual crash, Arai believes a rounder, smoother helmet shell is better able to slide over uneven surfaces,or glance off objects more easily,minimizing potential rotational forces. That’s why Arai believes the shell should have a smooth, round design with a continuous convex curve of minimum radius 75mm (R75)*.
It’s not something the standards demand. It’s something Arai demands. Because accidents don’t happen in testing labs.
* Arai R75 SHAPE concept does not apply to areas below test line, attachment areas of visor and ventilation ducts, or Classic series.