QUIET • COMFORT • OPTICS
ZTechnik revolutionizes windscreen performance with its new VStream® windshield. While creating a comfortable ride for the BMW sport touring rider, ZTechnik introduces QUIET into the equation. To create COMFORT, other manufacturers will offer taller windshields and spoiler tops to lift the air stream. ZTechnik designed, for the first time ever, a windshield with airflow calculated and adjusted to quiet the rider's environment. In addition, VStream windshields are designed with an unprecedented area of protection and an outstanding level of DURABILITY and OPTICAL CLARITY that is only available through the use of Quantum™ coated Lexan® polycarbonate.
The typical airflow pattern of the wake from most windshields is called a van Karman vortex. At speeds of 50-90 mph, the air swirls off the windshield in an approximate 90-degree segment of rotation, i.e. it rolls off the windshield, hits the bottom of the rider's neck on the way up, and curves off the shoulder at approximately 45 degrees. ZTechnik gave the VStream its name for the shape it takes at the upper edge. The "V" shape is so outstandingly quiet because it pushes this vortex out and away more than 4 inches from the side of the rider's head. The rider's helmet then resides in still air, and the passenger's environment is greatly improved as well.
DURABILITY and OPTICAL CLARITY