Shoei X-Spirit III Rear Stabiliser - Brink TC 1Shoei X Spirit III Rear Stabiliser Brink TC1 Outstanding performance. In function and appearance. With a coloured spoiler you can give your X SPIRIT III a striking look. Rear spoiler to replace the original part or to customize the helmet individually. The rear spoiler serves the aerodynamic stabilisation and ventilation of the helmet. The airflow creates a negative pressure in the area behind the spoiler, which forces used air to exhaust from the