Colnago V4Rs Disc Frame

The V4Rs has been conceived as a fully-integrated system. While working on the aerodynamics in order to reduce the overall drag, the superimposition of effects simply doesn’t work. All the components must be developed and tested together in order to state the overall benefits. That’s why all the presented data is obtained with the bicycle in race-ready configuration, which means that it is equipped with head unit, 2 bottle-cages but one bottle only (as in the crucial race phases).

This process of design and development started from the bike frontal area, which has a huge impact on the drag, both directly (A factor in the formula) and through its shape, by affecting the overall Cd factor.

The optimization of the frontal area also involved an evolution of the head tube geometry. Its shape has been revised and perfectly integrated with the new lightweight fork (designed to allow an effective tyre clearance up to 32 mm) and with the new cockpit. Although the head set upper bearings are bigger than the V3Rs ones, allowing the cables to run inside without the need of the D-Shaped steerer column and enhancing the overall front-end stability, the overall shape has a better drag. This, of course, required a deep surface modeling to keep the frontal area smaller and a better aerodynamic shape factor.

Specifications