Colnago's C64, C60, V2-R, V1-R and Concept framesets employ Colnago's ThreadFit 82.5 bottom bracket system. The frame carries an oversized bottom bracket shell with a threaded interface. Each side then receives what Colnago calls threaded rings or shells, that are essentially precision machined adaptors, which once installed, accept PressFit 86 bottom bracket bearings. These shell adaptors feature a low-profile 16-notch external spline system for simplified installation. The extreme low profile keeps the interface at the proper width, but means that many installation tool options would easily scratch the frame. Hence the Colnago PressFit Bottom Bracket Tool.
This steel notch tool has been machined to perfectly match the threaded shells, and won't interact with the frame surface. A 3/8" ratchet interface makes installation to the required 25-30Nm simple and efficient. The back side of the tool also has a smaller 16-notch interface compatible with many external bottom bracket tools like the Park BBT-9 or 19 options.
Ernesto Colnago was born in Cambiago, a small rural village in Italy in 1932. Ernesto was just 13 years old, but to start work, he had to be at least 14. He changed the date on his working papers and so was hired as an assistant welder. It was 1954 when Colnago went out on his own in a tiny little workshop, his bicycles have been used by more than 100 professional teams, 2,500 professional racers, who have won more than 7,500 wins worldwide. Champion riders of the caliber of Fiorenzo Magni, Gastone Nencini, Eddy Merckx, Giuseppe Saronni, Gianni Motta, Gibi Baronchelli, Michele Dancelli, Gianni Bugno, Oscar Freire, Johan Museeuw, Tony Rominger, Pavel Tonkov, Yaroslaw Popovych, Erik Zabel e Alessandro Petacchi, and many others, have ridden Colnago Bicycles to victory. As the great researcher and innovator he is, Colnago created the first frameset in carbon fibre in collaboration with Ferrari Engineering in 1986. The next year, the innovative straight-blade “Precisa” was created. Ernesto Colnago launched the “C50” in 2003, which marked the Fiftieth Anniversary of his company, a brand that has become synonymous with the best bicycles the world over, synonymous with the best products Made in Italy. Ernesto Colnago continues to dream about and create bicycles appreciated by riders passionate about cycling all over the world. Don’t ask Colnago which of his bicycles is the best: his answer is always the same. “I’ve made a lot of bicycles, but the most beautiful is the one that is yet to come.”