In the early 1980’s Colnago began experimenting with crimping main frame tubes to increase stiffness.

In the mid 1980’s, Colnago and Columbus developed the ESACOLNAGO tube which was a round tube with six distinct symmetrical flutes. The Colnago ESA Mexico was the last model to be built using these tubes and no longer featured in Colnago catalogues by the early 1990’s.