Tractor tricycle.

Fullsize image: https://diqn32j8nouaz.cloudfront.net...e_fullsize.jpg



Previously:

1985 Sinclair C5 electric tricycle - photos
Rocket II Trike 1000HP V8-powered tricycle - photo
1940 Hensel steam tricycle - photo
1898 De Dion Bouton tricycle - photo
Truck tricycle - GIF