Below is a list of serial numbers and descriptions for a variety of Eddy Merckx steel frames. When looking at the bottom bracket, with the frame veritcal and the headtube at the top, read this as upper left, lower left, lower right, upper right. Sort of a U shape. Because it sets a standard way for me to record this info, no other reason. Only when either a frame has been date verified by Gitabike or the Merckx factory do I add a verified model year. Model year bikes are begun production the year before, and as such its possible for their date code to be somewhat different than what the pattern suggests. The left side of the serial gives model and sometimes size information. Sometimes there are some other letters I haven’t deciphered.
Angelo Luigi had started work when he was just 12 years old and, in , after gaining sufficient experience, had decided to establish himself, seeing the cycling sector as fertile ground for his entrepreneurial vocation. His first customers were mostly small manufacturers but also leading cycling factories: Edoardo Bianchi, Umberto Dei, Atala, Giovanni Maino, and the Fratelli Doniselli.
Being aware of market movements, curious and highly motivated, Angelo Luigi brought the company through the Second World War and the revival, constantly developping his technological equipment, machinery and men, diversifying interests and production. In , the company was able to manufacture welded and seamless steel tubes used for the production of bicycles motorcycles Guzzi was winning with frames made of Colombo tubes , cars and aeroplanes.
I was wondering if some one could help put a date on it. does anyone know when Gitane made track frames out of Columbus EL tubing? where.
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Condor Vintage Frames and Bicycle Guide
While racing, there is just one rule: if you promise to help a teammate, you must help him; if you promise to lead out a sprint, you must lead it out; if you promise to give a hand on a climb, you must do so. You can’t be clever. Even if you find out that it’s truly your day, that you don’t feel the chain, that you’re going like a motorcycle.
These frames did not have welds or lugs at the head tube. Sienna. The Sienna was built from Columbus SL tubing and an “S” engraved into the fork crown. It.
We Figured it would be fun for those that have been around a while or if you are looking at an older bike and wanted more info about it. You can see the modern tubes specs here. The reduced thickness of tubing, made possible by the use of Nivacrom steel with very high yield strength makes the frame very light. This set is designed to optimize the frame’s performance in extreme load conditions.
Great for bigger riders. For the highest combination of lightness and rigidity. Also introducing the Zone Butted Concept, which provides more material in the areas of the H2O bosses and derailleur hanger. Appropriate for riders less than lbs. The utmost stiffness is assured by the tube thickness distribution according to the three axis. The inside section shape is elliptical in the butted section and the thickness butts extend in thin strips along the tube.
Tubes have short butted sections to increase frame lightness and are superfinished in the surface.
A FIRST GUIDE TO CLASSIC 20th CENTURY RACING BICYCLES
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Below is information on Columbus tubes that some might find informative. Cromor – 25CrMo4 steel, welded and cold drawn, butted to variable thicknesses using.
I recently had a frame made using the Cromor tubeset; mainly because it was the cheapest set they have. Now I’m wondering what really is the difference between the other sets and why they cost more.
Columbus – CENTO limited edition tubing set
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Buy a two hour Snow Tubing Ticket and donate at least one non-perishable food items, and get a free 2 hour Snow Tubing Ticket to be used at the same time that night. Two-hour tubing tickets include the use of a snow tube, conveyor carpet lift to avoid walking uphill, and the use of multiple tubing lanes for a fun snowy descent. Buy your tubing tickets online in advance beginning January 14 , as popular times will sell-out.
Snow Trails Vertical Descent Tubing Park offers a combined total of over adult, child, and adult double tubes. A five hundred foot conveyor carpet lift takes riders to the top to choose from multiple lanes for descent. Clients of the Program receive group and individual counseling, vocational rehabilitation services, family reintegration services, and are supported in developing an investment in a twelve-step recovery program.
21 of the best steel road bikes and frames to take a look at
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Columbus SLX was introduced commercially, as a tubeset, for the model year, though many manufacturers didn’t introduce SLX models.
I’m not an expert on the subject but since there seems to be no Centurion expert on the Web, I thought I would just throw out what I know. Most of what I’ve learned has been gleaned from others, including a former regional sales manager for Western States Imports WSI , the Canoga Park, California company that designed, had manufactured in Japan and marketed in the US and elsewhere its Centurion road bikes and, later, its Diamondback mountain bikes.
While Weiner focused on running the business and on marketing, “Cozy” Yamakoshi served as WSI’s product development manager, doing most of the frame design work and coordinating and supervising the manufacture of his creations in Japan and exporting them to the US. The earliest models of the Centurion line had high-tensile steel frames but by the late s and into the early s Centurion’s pricier models, such as the Professional and Semi-Professional late s , Pro-Tour late s to early s and the Turbo and Comp TA models early s featured Tange’s high-end Champion 1 or 2 tubing, a double-butted, seamless chromium-molybdenum CrMo steel alloy.
The difference in weight between Champion 1 and 2 tubing and the later high-end tubing used for Centurions, simply labeled Tange 1 and Tange 2 by about was so small less than 3oz for a 58cm c-c frame, all eight tubes that it seems a bit silly to debate supposed frame quality differences between these two high-end tubesets. Lower- end models of this period featured Infinity tubing for the three main tubes and high-tensile tubing for seat and chain stays and fork blades.
In the highly competitive market of the late s, Centurion’s mid-priced models boasted Tange 1 and 2 tubing for the three main tubes and use of high-tensile steel became a thing of the past for even entry-level machines as Infinity replaced it. The Centurion frames of the late s and early s were mostly outfitted with SunTour components or a mix of SunTour, Sugino and other components.
Later, as their rival Japanese component maker Shimano came to dominate the market with innovative, quality components at highly competitive prices, WSI switched almost entirely to Shimano, with the lower and mid-priced Centurions sporting the Shimano’s OEM “Light Action” parts and higher-priced models sporting Shimano , Shimano EX and later Shimano Ultegra and Shimano Dura-Ace groupsets. There has been discussion of the relative quality of the many Centurion models.
Columbus Compass Integrated Headset
Intelligent experimentation and technological progress continues to be the focus of the Columbus. Cromor – 25CrMo4 steel, welded and cold drawn, butted to variable thicknesses using shaped mandrills. Cromor steel is produced starting from a calibrated tube which has already received two drawing processes, before being reinforced in all the possible variable thickness offered by the range.
Zona, 29r and FAT – 25CrMo4 seamless steel: the chemical composition of this steel, specifying a higher percentage of Chromium, gives to the material good resistance properties to overheating. The formation of carbides prevents the grain enlargement: the steel maintains its properties during brazing and welding, even in the malleable raw state it features excellent mechanical characteristics. After specific processes of progressive drawing and forming, Niobium undergoes a special heat treatment that gives the steel its final characteristics.
that describes the different Columbus tubesets in layman terms. specific relating characteristics to particular tubes (e.g. top tube, seat tube, chainstays, etc..).
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