Tyrrell P34 six-wheeler

Tyrrell P34 1976

The Tyrrell P34 (Project 34), otherwise known as the "six-wheeler", was a Formula One race car designed by Derek Gardner, Tyrrell's chief designer.
The car used four specially manufactured 10-inch-diameter (254 mm) wheels and tyres at the front, with two ordinary-sized wheels at the back. The six-wheel design reduced the drag which would have been caused by two larger front wheels, increased the total contact patch of the front tyres and created a greater swept area for the brake discs.