It's been quite a while since we've had a decent concept bike on this here ol' Hot Tubes blog and what better way to celebrate a triumphant return than with this insanely cool concept out of the offices of the Art-Tic design studios, located smack bang in middle of downtown Barcelona, Spain. Designed for the the Spanish Marque Ossa, it represents the company's first non-trials foray since the early 1970. The brief from Ossa to Art-Tic was the stuff that any bike designer only dares dream about; take a classic race bike from the 1960s and update it for the 21st century. The result? A bike any rider would only dare dream about, and it has a Wacky Races sticker on it. Any cooler, and it'd turn nipples into diamonds at fifty paces. Mujers and hombres, feast your eyes on this.