Stilo AA0700AG1R55 Stilo AA0700AG1R55 ST5 GT 8860-2018 Carbon Racing Helmet - Adult Small (55CM)

55 CM Small;<br><br>Helmets must be paid for in full before delivery and are not refundable. Under the new FIA 8860-2018 standard all helmets must withstand the following tests: Standard impact: Helmet impact at 9.5m/s. Peak deceleration on 'driver's head' shall not exceed 275G. Low velocity impact: Helmet impact at 6m/s. Peak deceleration shall not exceed 200G with a maximum average of 180g. Low lateral impact: Helmet impact at 8.5m/s. Peak deceleration shall not exceed 275G. Crush: A 10kg weight falling 5.1 meters onto helmet. Lateral and longitudinal tests. The transmitted force should not exceed 10 kN.Shell penetration: A 4kg impactor dropped onto helmet at 7.7 m/s.Visor penetration: Air rifle fires 1.2g pellet at visor. Pellet must not penetrate the interior of the helmet. Visor coating: Transmitter test to ensure colouration and vision is not significantly changed or distorted. Retention system: Roll-off test and dynamic test to ensure strength of chin strap and its attachments. Chin guard linear impact: Impact test with full headform at 5.5m/s. The peak deceleration shall not exceed 275G. Chin guard crush: Hammer hits chin guard and measures ability to keep impact away from the head. FHR mechanical strength: Test to ensure high strength of attachment points for Frontal Head Restraints. Projection and surface friction: Test to ensure helmet surface uniformity and that friction is minimized. Shell surface also subjected to BARCOL hardness test for resistance to penetration. Flammability: Helmet exposed to 790 Centigrade/ 1454 Fahrenheit flame; it must self-extinguish once flame is removed. The Stilo Helmets ST5 GT 8860-2018 carbon helmet was designed for professional racers needing to satisfy the strict FIA 8860-2018 regulation. It's also the helmet of choice for drivers who won't compromise their safety, no matter where they're racing. This certification provides an unparalleled level of puncture protection as well as impact resistance. The Stilo Helmets ST5