The Bell HP7 Chin Bar Gurney (BEL2050060) is an aerodynamic flap that clips to the chin bar of the HP7 helmet, available in 8mm (medium) and 13mm (large) heights. Gurney flaps on a helmet chin bar work by interrupting the airflow separation at the lower edge of the shell, reducing the lift force acting on the chin bar at high speed. In an open-cockpit car at circuit speeds, that lift can cause the helmet to move slightly in the airstream; a gurney reduces it.
This specific part is used by drivers in Formula 1 and other top-tier open-wheel series. The correct size depends on your car, seating position, and the speed of circuit you primarily use; the 13mm is suited to faster circuits and higher seating positions where the chin bar is more exposed, while the 8mm is the more conservative starting point.
The gurney fits the HP7 shell only. Confirm your helmet model before ordering. If you are uncertain which size to run or whether your application warrants the fitting at all, speak to us before you order.
