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Columbus Servizio Corse Tubing?

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Columbus Servizio Corse Tubing?

Old 07-02-17, 11:08 PM
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Columbus Servizio Corse Tubing?

My current Masi Gran Corsa project bike has Columbus cromoly "Servizio Corse" tubing. I read that this tubeset was specced especially for Masi, but I can't find info on what sort of tubing it is. Butted? Seamed? Equivalent of SP? Light? Heavy?
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Old 07-03-17, 06:11 AM
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The best indicator to the grade of the base tubeset is the diameter of the seat post. Once you have that, you can determine the equivalent standard Columbus tubeset.
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Old 07-03-17, 06:15 AM
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It is 27.2
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Old 07-03-17, 01:52 PM
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Thank you both, that opened up a new chapter of bike lore for me, but other than 27.2 being indicative of a "high quality" tubing it doesn't seem to be very specific -- may not even be butted. Could be SP, could be Aelle. Its use on a lower-level frame and lack of a tubing model that would be a selling point in itself would argue against highest level tubing. Not that it matters, but I include this comment as a bump in case someone with Masi-specific knowledge might see it.
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Old 07-03-17, 03:44 PM
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Originally Posted by howellhandmade
Thank you both, that opened up a new chapter of bike lore for me, but other than 27.2 being indicative of a "high quality" tubing it doesn't seem to be very specific -- may not even be butted. Could be SP, could be Aelle. Its use on a lower-level frame and lack of a tubing model that would be a selling point in itself would argue against highest level tubing. Not that it matters, but I include this comment as a bump in case someone with Masi-specific knowledge might see it.
If 27.2mm is the correct seat post diameter and if it was based on an existing tubeset, that narrows things down significantly. The plain gauge sets such as Aelle, Gara and Zeta, all used posts smaller than 27.0mm. Heavier gauge, butted sets such as Aelle R, SP and SPX used 27.0mm posts. The only round, standard diameter gauge Columbus tubesets that used 27.2mm, up until 1991,were SL, SLX, TSX and Matrix/Cromor. Those four can be narrowed further by checkinglooking insdie the bottom bracket shell and checking inside the ends of the down tube, seat tubw and chain stays for the helical ridges indicative of SLX and TSX.
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Old 07-06-17, 06:02 PM
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I have a suggestion that worked for me in getting information about the alloy and butting of the "Tenax" tubing used by Schwinn in the late 1980s.

Shoot an email to info@columbustubi.com and ask them specifically about Columbus Servizio Corse tubing used by Masi.

After lots of guessing about Columbus Tenax used by Schwinn, Andrea at Columbus responded to my email inquiry:

Originally Posted by Andrea at Columbustubi
Dear Stan,

The Tenax was the tube-set made during the middle '80s, those were actually the 3 main tubes, made like the Cromor tubes in seamed 25 CrMo 4, and double butted.
Good result in term of stiffness but was not one of the light tubeset line.

Thanks and best regards,
Andrea
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