Well....the short of it is this...Less G-Forces to the brain equals less chance of injury, the numbers given are averages from flat impact and round impact as well. Now tell me if more expensive helmets are actually safer or not...Granted, creature comfort is what the price tag is for I would guess...
AVERAGE Gs
Fewer Gs = Less chance of brain injury
DOT-only helmets:
Z1R ZRP-1 (P)
Average: 152 Gs
LF: 148 gs
RF: 176 gs
LR: 153 gs
RR: 130 gs
Fulmer AFD4 (P)
Average: 157 Gs
LF: 152 gs
RF: 173 gs
LR: 175 gs
RR: 130 gs
Pep Boys Raider (P)
Average: 174 Gs
LF: 163 gs
RF: 199 gs
LR: 185 gs
RR: 152 gs
BSI/DOT Helmets
AGV Ti-Tech (F)
Average: 169 Gs
LF: 156 gs
RF: 199 gs
LR: 195 gs
RR: 129 gs
Suomy Spec 1R (BSI) (F)
Average: 182 Gs
LF: 192 gs
RF: 215 gs
LR: 197 gs
RR: 126 gs
ECE 22-05/DOT Helmets
Schuberth S-1 (F)
Average: 161 Gs
LF: 151 gs
RF: 180 gs
LR: 176 gs
RR: 137 gs
Suomy Spec 1R (ECE) (F)
Average: 171 Gs
LF: 156 gs
RF: 200 gs
LR: 190 gs
RR: 140 gs
Shark RSX (F)
Average: 173 Gs
LF: 166 gs
RF: 187 gs
LR: 201 gs
RR: 141 gs
Vemar VSR
Average: 174 Gs
LF: 171 gs
RF: 198 gs
LR: 166 gs
RR: 162 gs
Snell 2000/DOT Helmets
Icon Mainframe (P)
Average: 181 Gs
LF: 168 gs
RF: 217 gs
LR: 189 gs
RR: 152 gs
Icon Alliance (F)
Average: 183 Gs
LF: 179 gs
RF: 200 gs
LR: 179 gs
RR: 175 gs
Scorpion EXO-400 (P)
Average: 187 Gs
LF: 185 gs
RF: 212 gs
LR: 193 gs
RR: 158 gs
AGV X-R2 (F)
Average: 188 Gs
LF: 192 gs
RF: 226 gs
LR: 166 gs
RR: 167 gs
Arai Tracker GT (F)
Average: 201 Gs
LF: 193 gs
RF: 243 gs
LR: 203 gs
RR: 166 gs
HJC AC-11 (F)
Average: 204 Gs
LF: 195 gs
RF: 230 gs
LR: 231 gs
RR: 163 gs
Scorpion EXO-700 (F)
Average: 211 Gs
LF: 207 gs
RF: 236 gs
LR: 226 gs
RR: 176 gs
Impact Key: LF: Left Front, 7-foot drop, Flat Pavement. RF: Right Front, 10-foot drop, Flat Pavement. LR: Left Rear, 7-foot drop, Flat Pavement. RR: Right Rear, 7-foot drop, Edge Anvil. Shell Key: (P): Polycarbonate (F): Fiberglass