The helmet should not pull off of the dummy head. This test has not yet been approved by the final ASTM process, and therefore is not part of the ASTM standard yet. Helmets which do not meet it can bear an ASTM label. The main significance for consumers of either change is to improve the ASTM standard and make it more realistic. In our opinion no rolloff test will ever substitute for having the consumer buckle the helmet and try to push it off.
Heads are different, hair is different, and strap adjustment is very different.
But adding the rolloff test at least forces the manufacturer to provide a full range of strap adjustments. Eventually the testing may be refined enough to produce reliable results for every body. If you want a copy of the current ASTM standard, contact ASTM at 1916 Race Street, Philadelphia, PA 19103-1187, tel. BHSI is a member of the ASTM committee and we attend all of its meetings, in case you have comments you want brought to the committee's attention. Consumer advocates are always welcome.