Colnago C64 DISC PJBI Chassis

The Colnago C64 Disc represents the evolution of the C60 Disc. The frame uses completely revamped materials, but is hand-built using the same flagship techniques of the Cambiago factory.

Colnago C64 Disc: completely handmade, made-to-order, in Italy, it is the fruit of more than two years of research but also the child of the company's history of success and innovation since 1954. The tubes and joints of the C64 are made from the finest carbon fiber to produce a unique frame that cannot be compared to any other in the world. Contained in the design of the C64 is all the knowledge and experience of Ernesto Colnago.

FEATURES

Fork
The fork of the C64 has been completely redesigned, with an external rib that gives the athlete more comfort but also increases the riding qualities (lateral stiffness). To increase stiffness and strength, a special rib inside the steerer tube was created, co-laminated with a threaded aluminum insert that also effectively replaces the traditional expander. The C64 disc fork is made with a special C/D shape to allow the hydraulic hoses to pass completely inside the stem, for total clean lines. The front thru-axle, still 12 mm as with the C60 disc, is now a hexagonal threaded type for maximum weight reduction of the system. Weighing only 355 g, with the same shape as the disc version, the traditional brake fork accommodates pivots for direct-mount brakes, a necessary choice to provide the necessary space for the use of wide-section tires. The fork length was increased by 5mm, a stratagem that allowed for a hollow fork head, reducing weight but maintaining the same stiffness and performance as the C60 fork. The dropouts are now carbon fiber, made using a process similar to forging metal.

Steering tube
Although it retains the same shape as the equivalent C60 junction, the head tube of the C64 is made with a new technology that has reduced thickness and thus weight. The shape has also been revised in the central part, with the addition of a pronounced rib to increase lateral stiffness. As with the rest of the frame, the surface finish is now uni directional carbon, instead of 3k, for further weight reduction.

Headset
Building on the experience gained with the Concept headset, that technology was transferred to the C64 model as well. The upper part of the headset has been revised; it is now made of a special polymer composed of carbon fiber, nylon and elastomer. This feature offers an added ability to dampen road vibrations, improving ride characteristics and comfort.

Down tube
Starting from the star shape of the C60 down tube, we revised the lower part, which is now of slightly reduced width. This choice allowed us to balance the stiffness of the frame's central area more effectively. To further increase torsional stiffness and maximize component integration, the down tube features a lowered area near the bottle cage mount. Although the C64 is not a frame born with aerodynamic ambitions, this feature provides a clear advantage over a traditional solution. The cable clamp for the mechanical groupsets is now located on the downtube in the area near the headset and machined from molds.

Seat tube
Probably the most obvious difference between the C60 and C64 is the seat tube, which in the latter model merges with the saddle joint to form a single monocoque piece. This feature increases the stiffness of the frame while keeping the weight down. Also visible in this detail is the high rear chainstays joint, no longer straight but with a conical shape, to increase the bonding force and thus overall stiffness.

Locking
The saddle node is extremely clean on this model, thanks to the fully concealed and structurally integrated seatpost locking system. Instead of a vertical insertion system as on the V2 and concept, the C64 has a single lower-pull wedge. The weight reduction is about 15 g, and the wedge's contact area with the frame is reinforced with an aluminum anima co-molded together with carbon.

Seatpost
Based on the shape of the V1-r seatpost, it offers a slight gain in aerodynamics but more importantly increases vertical absorption of bumps, compared with the previous 31.6 mm diameter round tube. The stock seatpost has a 15 mm offset, while 0 mm and 30 mm versions are available aftermarket.

Bottom bracket
Designed around our proven TF 82.5, the pressfit standard with removable cups, the bottom bracket joint is now more complex than ever. The cable guide, typically a bolt-on plastic detail, is now molded directly into the carbon for maximum weight savings and the widest possible radius for the best shifting performance. Another small detail is the hexagonal shape on the right side, the benchmark for frame assembly and quality control. Finally, perhaps the most noticeable difference is the asymmetry of the rear carriage inserts, with the left now much wider.

Rear Carriage
Another important area where we completely revised the technology is the rear carriage. The dropouts of the C64 are now an integral part of the horizontal chainstays. The one-piece construction allowed us to lower weight, increase comfort and maintain the same lateral stiffness. This disc version features the same full carbon construction, as well as a 12 mm rear axle and directly co-molded flat-mount brake housings. The replaceable shifting dropout is the same, internally mounted dropout used on the other carbon frames (V2, Concept, C-rs, K.one). The very light vertical monocoque is designed around wide tires and houses the direct-mount brake mounts.

Rear tire space
While reducing weight has been key to the design so far, space for larger-section tires was another important factor considered in the design of the C64. The frame is designed with a maximum footprint of 36.5 mm, which translated into simple words will allow you to use 28 mm tires with enough room to pedal serenely in all conditions.

Included

• Frame kit.
• Headset.
• Seatpost.
• HH12 thru-axle pins.(Disc version)