oversize tubes were used on the Tecnosone of the lightest production steel bikes produced. Similarly crimped oversized aluminum tubes were used on the Dream frame. In 1981 Colnago prototyped the CX Pistaa full monocoque carbon fiber cycle with disc wheels, which was shown at the Milan bike show. Subsequently, Colnago worked with Ferrari to develop new carbon fiber technology, and Ernesto also credits their engineers for challenging him regarding fork design, which led to Colnago's innovative Precisa straight-bladed steel fork (1987). Colnago also experimented with multi-material frames, including the CT-1 and CT-2 constructed with titanium main tubes, carbon fiber forks and rear stays, and a similarly constructed (although short-lived) Master frame constructed with steel main tubes, carbon forks and stays. Colnago's early attempts at carbon fiber frames were not commercially successful, but the lessons learned were embodied in their flagship frames, such as the C-40, the most sought after bicycle (1994), and its successor, the C-50 (2004)respectively named for Colnago's 40th and 50th years in bike building. These carbon fiber frames set new standards of excellence. They were built using a modified form of traditional cycle frame construction, substituting carbon fiber lugs for microinfusion cast steel, and carbon fiber "tubes" for the complex steel tubes used for steel frame construction. Similar building techniques are used in the latest design, the C59, named (as before) for its year of production. While we take for granted the spread of carbon frames, their success was not a foregone conclusion: “When we built the C40 we were the only ones to build carbon frames and all the mechanics and competitor technicians were saying that they would be too dangerous to use on cobbled roads, especially with the straight carbon forks. There was a company that wanted to fit suspension forks on the bicycle, but I wasn't going to have suspension forks on the C40. The night before Paris- Roubaix I had Mr. Squinzi, the Mapei boss, on the phone to me raising his concerns about using such a delicate-looking thing. I told him that we'd done all of the tests that we could on the frame and the fork and we were certain there would be no problem. I had to take personal responsibility for what was going to happen and I spent all night worrying about it, barely able to sleep. But when I heard that there were 4 Mapei riders in the