Now, Colnago’s titanium sleeve is knurled on the outside and has four teeth locking into notches in the carbon shell (see photo). Early models had aluminum bottom bracket sleeves like most carbon frames. The carbon is now lighter and stiffer, and the stays and bottom bracket have changed since the first of its Paris-Roubaix victories.
That’s right – custom carbon frames! And if the airlines damage one of your tubes, Colnago can replace the tube and get your bike back on the road you need not buy a whole new frame. In eight years of making C40s, Colnago claims to have never had a single failed glue bond.Ĭolnago makes C40 lugs in 19 different angles so a wide variety of geometries are possible, and customers can order custom C40s. The fully-contacting tubes work together and complement the lug’s strength. On a welded metal frame, it is obvious that there would be no strength to the joint if the tubes did not have this kind of complete contact to eliminate gaps in the weld, and it also makes a bike difference in a bonded carbon frame. Colnago instead miters each carbon tube precisely, just like the tubes of a welded titanium or aluminum frame (or lugged steel Colnago Master), so each tube fish-mouths around the next tube with complete contact between the tubes. Most lugged carbon builders cut the tubes off straight and stick them into or over the lugs, but then the joint strength is entirely dependent on the lug’s strength. Integral to the C40 are one-piece molded, hand-finished carbon lugs that eliminate the bonding problems and weight of aluminum lugs and are stronger, stiffer, lighter (and costlier) than carbon lugs made of separate parts glued together. Mitered tubes ready for the bottom bracket shell
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