Updated September 30, 2026
What is Fit range?
In short
The head sizes a product covers, given as the sizes the brand itself lists.
Fit range is the span of sizes a product covers. For a helmet it is a measurement of head circumference, often split across several sizes of the same shell. A helmet that is too loose shifts on a bumpy road, and one that is too tight is uncomfortable within minutes, so check the range before ordering. CUBE lists S 49-55, M 52-57, L 57-62, Lumos Helmet lists 55-58cm, 58-61cm and Atomi lists M. Measure around your head just above the ears, then compare that number with the range, not with the size letter alone.
Sources
- atomiscooters.com, checked September 30, 2026
- ridelumos.com, checked September 30, 2026
- cube.eu, checked September 30, 2026