Non sono in grado di darti spiegazioni approfondite sulle differenze tra i vari materiali o sulle strutture delle calotte, ma forse possono interessarti i risultati di prove reali effettuate su alcuni caschi...
http://www.motorcyclenews.com/MCN/News/newsresults/mcn/2008/June/9-15/jun1208-sharp-motorcycle-helmet-test-results/?&R=EPI-101052http://www.pianetariders.it/2008/06/tutta-la-verita-sui-caschi-per-moto/http://www.motorcyclenews.com/MCN/News/newsresults/mcn/2008/June/9-15/jun1208-sharp-motorcycle-helmet-test-results/?&R=EPI-101052...e non mancano le sorprese...
Riporto i risultati, i punteggi vanno da 1 a 5 (5 è il massimo di protezione riscontrata)
Make/Model Style SHARP /Size /rating
AGV Airtech Full face XS-XXL 4
AGV K Series Full face S-XL 3
AGV S-4 Full face XXS-XXL 5
AGV Ti Tech Full face XXS-XXL 4
Airoh Leox Full face XS-XL 3
Airoh Speed Fire Full face XS-XL 4
Arai RX-7 Full face XS-XXL 3
Arai Condor Full face XS-XXL 2
Arai GP5x Full face XS-XXL 5
Arai Viper GT Full face XS-XXL 3
Arai Astro Full face XS-XXL 3
Arashi Viper Full face S-XL 4
Bell M1 Full face XS-XXL 5
Box BX4 Full face XS-XXL 2
Box BX2 Full face S-XL 4
Grex RF2 Full face XS-XXL
Grex R1 Full face XS-XXL
HJC HQ-1 Full face XS-XL 5
HJC CS-12 Full face XS-XXL 2
HJC FG-14 Full face XS-XXL 3
HJC CL-ST Full face XS-XL 3
HJC FS-10 Full face XS-XXL 3
HJC CS-12N Full face XS-XXL
HJC CS-R1 Full face XS-XL
HJC FG-15 Full face XS-XL 4
HJC IS-16 Full face XS-XXL 2
KBC Force RR Full face XXS-XXL
KBC VR2R Full face XXS-XXL 2
KBC VR1-X Full face XXS-XXL 3
Lazer Fibre Pro Full face XS-XXL 4
Lazer LZ6 Full face XS-XL 5
Lazer Tornado Full face XS-XL 2
Lazer Vertigo Full face XS-XXL
Lazer Fibre D1 Full face XS-XL 4
Nitro N810VX Full face S-XL 4
Nitro N820VX Full face S-XL 4
Nitro N330VX Full face S-XL 2
Nitro N755VX Full face S-XL 4
Nitro N1430VX Full face S-XL 4
Nitro N1600 VN Full face S-XL 4
Nolan N62 Full face XS-XXL 4
Nolan N84 Full face XS-XXL
Premier Monza Full face XS-XXL 4
Roof RO10 Diversion Full face XS-XXL 4
Roof RO10 Daytona Full face XS-XXL
RST Racevent Full face XS-XXL 3
RST Cobra Vent Full face S-XL 4
Schuberth S1 Full face XS-XXXL
Scorpion EXO-700 Full face S-XL 4
Shark RSR2 Full face XS-XL 5
Shark S500 Full face XS-XXL 4
Shark RSF 2i Full face XS-XL 4
Shark RSI Full face XS-XL 4
Shark S800 Full face XS-XL 4
Shoei Raid II Full face XS-XL 4
Shoei XR-1000 Full face XS-XL 3
Shoei X-Spirit Full face XS-XL 4
Suomy Extreme Full face S-XL 3
Suomy Gunwind Full face S-XL 3
Suomy Spec 1R Full face S-XL 3
Takachi TK-30 Full face S-XL 2
Urban N20 Full face XS-XXL 3
Vemar VSREV Full face S-XL 2
Vemar TAI2K Full face S-XL 3
X-Lite X601 Full face XS-XXL 4
X-Lite X602 Full face S-XL 4
X-Lite X701 Full face S-XL
X-Lite X801 Full face S-XL
dove non è indicato il rating (punteggio) ovviamente non era disponibile.
ciao