Register C4

Edited by Fabio, email: HISTORY C4 was born in February 1986 to realize and build with carbon fibers, the projects of Marco Bonfanti, engine and founder of the company. The first pieces made were frames and racing forks. To achieve this, C4 has always used its own carbon molding system, which is called NJC (No Joint Construction), which allows the construction of hollow structures printed without joints. The debut of the C4 frames in cycling competitions, took place in May 1987, the Bianchi racing team participated in the time trial stages of the Giro d’Italia equipped with frames and forks designed and built by C4. These frames were a world premiere for some particular features such as, entirely monocoque carbon construction without joints, saddleless frame, adjustable seat box that allowed with three unique frame sizes to cover all sizes, carbon monocoque front fork. At the Milan Cycle Fair in October 87, the world’s first race wheels, designed and built by C4, were displayed in a bicycle presented by a well-known Italian manufacturer in collaboration with a car manufacturer. In the same year they are also the first MTB, Mars, Earth and Moon, all characterized by the absence of the plan. At the Cologne 1992 fair, an innovative frame with a carbon monocoque front quadrilateral and aluminium rear tubes glued directly in print was presented, a technique that C4 uses for all glues on the frames since 1989. At the Milan Fair 1993 a new bicycle was presented by C4, the model 47.61 first high-performance racing bike that using a specific design of the set allows to cover all the sizes of the cyclist from size 47 to size 61. In 1994 C4 is the sponsor of a leading team of professional runners, the Polti team with among others, Gianni Bugno and Ivan Gotti. As a result of this experience, the CLASS frame was born and presented at the Cologne fair in 1996, the first in the world to break the kilogram of real weight for a production frame. Then will come the frames, Magik, CRONO, CLASS 99 (evolution of CLASS, integrated steering series and larger section tubes) the EGO in one size (later also produced for Wilier, in three sizes, with the name Karbon2) the CLASS SR, the latest evolution of the CLASS in the traditional form and the Vyrus, the first bike produced in series, with integrated seating and slooping. In the end, the CLASS SR Integral, a CLASS SR frame but with a built-in seater, is provided, as for the Vyrus and the evolution of the CRONO, with the carbon on view. The same type of finish will also be proposed for the frames that C4 will produce for the Wilier, and which on the market will be proposed under the name Karbon2 DeLuxe. The performance of the objects that C4 produces, are for Marco Bonfanti, owner and designer of C4, the primary goal. Further insights regarding the C4 philosophy and some curiosities at the following link “Trying to know why things has always fascinated me deeply. If you know why you can go further, if you don’t go there it’s because you didn’t know it. Black or white. On-off. Mark Bonfanti

Model Year Frame No. Owner Card
47.61 1993 Absent Bc. Card 010
Class 99 1998 129802467 Fabio Dri Tab 011
Heron 1998 498R23.9 Fried Jacob Tab 012
Magik 1998 6/9802180 Fabio Dri Tab 013
47.61 2001 Absent Fabio Dri Tab 014

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