Aerodynamic Performance
Among the most important and widely studied properties in racing, no stone was left unturned during the development of the X-Fifteen’s aerodynamics. Designed and refined in SHOEI’s state-of-the-art wind tunnel facility, the X-Fifteen boasts impressive improvements in all aerodynamic performance measurables.
- Refined in SHOEI’s wind tunnel to yield the most streamlined and stable X-Series helmet ever
- Boasts impressive reductions in drag (6.1%) and lift (1.6%) as compared to its predecessor
- Bottom third of helmet (from chin bar to rear of shell) has been narrowed, and, together with updated rear stabilizer and flap designs, achieves optimal balance and stability
- Pronounced edges on the top left and right sides enhance aerodynamic performance by allowing wind to stream off the helmet with minimal resistance
- 150+ profile shape iterations were tested and refined during the X-Fifteen’s aerodynamic development
- Aerodynamic optimization was achieved in numerous riding and racing positions, with an emphasis placed on high-speed stability at speeds in excess of 218 mph.
Racing Ventilation
Overheating while riding and racing can have a direct impact on rider fatigue and safety, which is precisely why ventilation performance was a crucial feature while designing the X-Fifteen. Wind tunnel testing throughout development revealed optimal airflow in multiple riding positions, but none more important than the aerodynamic, tucked racing position.
- Features seven (7) closable air intakes and six (6) exhaust outlets—all strategically shaped and located to maximize airflow and negative air pressure suction
- Enlarged EPS tunnels (from 6mm to 10mm in depth) dramatically increase cool-air volume and the rate of hot-air expulsion
- Significant improvements to the cheek pad cooling system help deliver refreshing air and clear humidity from the rider’s face with even greater efficiency
- Wind tunnel optimized to excel in the tucked racing position, even behind windscreens.
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