An interesting concept car is described in the October 17, 1907 NYT:

The autocycle runs upon four wheels, but the position of the wheels is totally different from that of any other vehicle. The front wheel is situated directly in the centre and partially under the forward part of the machine, and the rear wheel is in direct line with the forward one, as in the case of a bicycle. The wheels are placed further apart, however, and on each side are two wheels, known as the balance wheels, connected by an axle with steering knuckles.

The body of the autocycle is carried upon the front steering and the rear driving wheels. The side wheels maintain the equilibrium of the vehicle, but ordinarily take little or no weight. By the use of a specially designed link check spring device they remain at all times in contact with the roadway, these balance wheels turning in unison with the front wheel, each at its proper angle in rounding a curve. No differential gear is required, a single centre chain drive being used.

[T]he car that he [Mr. Vandergrift, the designer] drove from Syracuse is equipped with a twenty horse power motor.

"The motor will produce a speed of sixty-five miles an hour...This larger autocycle weighs 1,400 pounds and it can easily make twenty-two miles on one gallon of gasoline...the autocycle has been tested over rough roads, up steep heels [sic], and it can go anywhere that the ordinary motor car can."