At the beginning of 90's at the birth of today's mountain biking Bianchi released it's Ragno series.
With it's innovative geometry the it was a game changer at it's time. Came out with various models for every level. The main difference of the models was the quality of the tubes used for these frames.

While the basic models had simpler steel tubes, the more premium Araneus was built by high quality Columbus steel tubes.

The Araneus was used by the Bianchi factory team in the world series. At the time it was ATB aka. All terrain bike.