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Colnago C64 Rim - Frameset

Color: RC19
Size: High - 56cm

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Colnago C64: Hand Made In Italy. Completely handmade – in Italy. The C64 is the fruit of more than two years of research. Indeed, it was designed based on a long history of cycling innovation and success – one which began in 1954. The C64’s revolutionary tubes and lugs are larger, lighter, more durable and fabricated with the finest quality carbon fiber. Within the C64 design lies the culmination of Ernesto Colnago’s knowledge and experience, gained from a lifelong pursuit of cycling perfection.

Fork: The C64’s fork has been fully redesigned, with an external rib-shape to give the rider more comfort (front stiffness) but also to increase the ride-quality (side stiffness). To increase the stiffness and strength, Colnago created an internal rib in the steerer tube, which also holds the nut for the top cap and eliminates the need for an expander-plug. Fork weight is 355gr. With the same shape as the disc fork, the rim version houses the pivots for the direct-mount brakes – which offers plenty of tire clearance. The fork length was increased by 5mm to be able to accomidate larger tires yet still have a hollow upper structure, to lower the weight but still retain the same stiffness and performance as the C60 fork. Dropouts are now full carbon – replacing the alloy dropouts used on the C60.

Head Tube: While still retaining the same overall shape as the C60, the C64’s headtube features a new technology which allowed a reduction of the thickness and a lowering of the weight. The shape was also revised to increase side stiffness. As was the entire frame, the headtube was changed from an outer 3k carbon finish to a lighter UD finish.

Headset: Based on the experience with the Colnago Concept headset, Colnago wanted to bring that technology to this model as well. The revised upper cups are now made of a special polymer composed of carbon fiber and a special mix of nylon and elastomers. This feature offers additional capacity to absorb road vibration, improving both handling and rider comfort.

Downtube: Starting with the design of the heavily shaped C60 downtube, we revised the bottom portion, which is now a bit narrower to match better with the rear triangle – for a perfect balance. To increase the torsional stiffness and maximize the integration of components, the downtube features a recessed bottle cage area which creates two long ribs around the middle of the downtube. Regardless of the fact that the C64 was not designed to be a purely aerodynamic frame, the recessed bottle cage gives a clear aero advantage over a traditional mounting position. Cable stops for mechanical shifting are now located on the downtube, in a tucked position behind the headtube.

Seat tube: Probably the most striking difference between the C60 and the C64 is that the seat tube meets the seat tube lug to form a single piece. This technical feature increased the stiffness of the frame, while keeping the weight low. The monostay is no longer straight either, but is conified to create the best possible assembly surface.

Seat clamp: For a perfectly streamlined seatpost area, the C64 now features a hidden integrated clamp. Instead of a top-loaded, two-piece seatpost clamp, the C64 has a co-molded alloy bed, with a single removable part tightened from the bottom. The overall look is sleek, and the weight reduction is around 15gr compared to the other style. The bottom-pull concept also provides further locking strength as rider weights increase.

Bottom bracket: Colnago designed around the ThreadFit 82.5, which is basically a PressFit with removable base sleeves, the bottom bracket lug is now more complex than ever. The cable guide, which was typically a bolt-on plastic part, is now molded into the lug – to save grams as well as to offer the biggest possible radius for the best shifting performance. Another small detail is the hex shape on the side of the downtube insert, which is our datum point to check anything during the bonding of the frame and, later, the QC process. Another striking difference is the asymmetric insertion of the chainstays, with the left one being much wider.

Ceramic Speed: From the beginning of the ThreadFit 82.5 project, the idea was to keep the reliability of a threaded BB but offer the benefit of a wider shell, typical of a PressFit system. Now, Colnago has moved further forward with a collaboration with premium bearing brand Ceramic Speed. Colnago now has a threaded, wider bottom bracket, with bestin-class bearings. Three different bottom brackets (Campagnolo, Shimano, SRAM) will be offered as aftermarket purchase options.

Rear Triangle: Another key area where Colnago completely changed the technology is the chainstay/dropout area. The C64’s dropouts are now fully part of the chainstays. The one-piece construction provided a lower the weight, additional vertical compliance, and retention of the same lateral stiffness. The disc-brake frameset features threaded 12mm thru-axles and co-molded flat-mount brake provisions. The rim-brake chainstays are a bit wider than the disc version, to help keep the same rear stiffness due to the lack of the thru-axle. This results in a very light but stiff full carbon rear end. The replaceable derailleur hanger is the very same, internally mounted hanger used on all our current road rim-brake frames. The lightweight seat stay is designed to accommodate the new generation of wider tires and houses the alloy threaded inserts for direct-mount brakes.

Tire Clearance: While lower weight has so far been the key point of the new frame, tire clearance is another important factor addressed while designing the new C64. The frame has a clearance of a 36.5mm diameter at a 345mm radius, which means you can use 28mm tires with plenty of room to spare. Brakes are the limiting factor here, so the disc version has a bit more space.

Stiffness: The target for any modern frame is to increase the stiffness, while reducing the weight and adding as much vertical compliance as possible. With the C64, we kept the same rear stiffness, trying to replicate the appreciated balanced performance of the C60, while adding a bit of vertical compliance to give the rider more comfort.

Weight: Weight was never an obsession here in Cambiago, but we are always looking forward to improving our products in any direction. Keeping the same safety standards always used on Colnago frames, which are much higher than the common ISO-EN, it was still possible to reduce a lot of weight from the frame. Disc frames are only 15gr heavier than rim-brake versions.

Weight Comparison: It is common to refer to the frame weight as the main factor in the total weight of a bike, but that is not entirely accurate. Compontents and details really matter on a bike frame, so Colnago worked dilligently to reduce unnecessary weight all around the frame. For example, the C64 fork is now 40gr lighter than the C60 fork, yet stronger and stiffer. So, the total weight loss of the C64 frameset, compared to the previous C60, is around 205gr. The disc version, thanks mainly to the new threaded thru-axle, and the full carbon dropouts, is 270gr lighter than the C60 Disc frameset.


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