The Gato Montés motorcycle by Spanish inventor Jose Artes de Arcos never made it past the prototype stage owing to the difficulties in its being stable due the the width of the wide wheels, a three wheel version was considered but other projects forced the little motorcycle to be abandoned.

Arcos fertile mind also created a second prototype fitted with a Sachs 250cc Rotary engine and even a 12 wheeled rover bike the he called "El Gato spider" (The Cat Spider )