Classic & Vintage - ??what columbus tubing is this ??

I bought a titan bike on e-bay, the tube set is said to be columbus tubing but no columbus stickers on bike. THE FRAME IS NOS and is 1989 to 1992 vintage , it is not SLX or THRON , could be CROMOR or Aelle. the seat tube is 27.2 .
the thing is the downtube and toptube both have diamiond shape stamping all around them about 3" away from the lugs along the whole tubes which are apparent and under the paint. After receiving the frame I looked inside the downtube and the diamond patterns also shows inside.
I find it hard to believe the frame makers would do this to the tubing and would jepordize it's integrity, so my question is . Did columbus do this stamping at one time on some of there tubes and what tubing might it be. thanks

Which frame did you buy?

Have any pictures?

I am amazed with the two I've built, very nice ride. . .

It A 52 cm blue,black purple, I was not crazy about the colour scheme but it looked a lot nicer then the picture when I received it, sure would like to know what tubing this is, got some NOS suntour sprint group to put on it.

The frame material probably dosen't matter much except for a slight weight difference. http://draco.acs.uci.edu/rbfaq/FAQ/8e.2.html

Based on the photograghs from the website http://www.velomech.ch/ you gave me; your's may be Columbus CROMOR.

I was looking at the same model you have for my next build. . .

COLUMBUS TUBING

http://pcd403y.vsb.cz/personal/bike/columbus.htm

Tubing - Steel Type - Weight/gr. - Description


Aelle Carbon/Manganese/Vanadium 2,345 Lightweight and resilient, featuring cold-drown

thin-wall tubes. A tube set for amateur and sport cyclists.

Cromor 25 Cr Mo 4 2,190 Cold drawn and double butted, this tube set is ideal for more

demanding riders who favor the use of versitile, high performance frames at an affordable price.

Thron Chrome Molybenum 2,067 From the knowledge and experience of working with the EL/OS

in professional races, Columbus created a tube set with similar qualities at a lower price.

SL Chrome Molybdenum Cyclex 1,932 High performance, all purpose double butted road

racing tube set. SL has been the flagship tubing in the Columbus family for decades.

SLX Chrome Molybdenum Cyclex 1,966 "Superbutted" tube set with 5 cold-drawn helical

reinforcements. Making them the sturdy and resistant to deformation in the frames area of major

stress. Intended for the profressional cyclist.

PRX Chrome Molybdenum Cyclex 1,945 The newest Columbus tube set for high level

professional use. Offering maximum rigidity and low weight. Reinforced with five continuous spirals

in addition to traditional double butting.

MAX/MINIMAX Nivacrom 1,940/1,670 Tubes with oval profiles oriented to the principal

axes of the active and passive stresses. Intended exclusively for the special competition machines.

EL/OS Nivacrom 1,670 Frames built with EL/OS tubing are the lightest of all, yet their

resistance and toughness are comparable to any other steel frameset. Designed for professional road

racing cyclists, and ideal for time trials, hill climbs, and triathalons.

GENIUS Nivacrom 1,450 DSB--Differential Shape Butted, is a revolution in tubing

construction. It was developed according to a new type of stress analysis that introduces third

deminsion in a tube's butting.

Did you check the bottom of the fork's steeerer tube for the spiral ridges? That would at least indicate it's Columbus. Is the tubing oversize or irregular shaped, outside of the impressions?

The diamond stamping is probably intended to stiffen the tubing, in much the same way as Colnago's Gilco, diamond shaped tubing.

The fork was seperate from the frame and I know it is not columbus, and yes the tubing is round and normal shape. here is a link of what the frame looks like but I cant make out the tubing decal or if this frame has the same diamond pattern. this frame decals looks to be slx based on the colours of the stickers, my frame has no internal spirals in the seat tube at the bottom bracket. http://www.velomech.ch/images/rahmen/rahmen-52-7-g.jpg and here is another frame with the same pattern but with a different sticker on it http://www.velomech.ch/images/rahmen/rahmen-48-11-g.jpg (you can see the diamond pattern on the top tube.

The fork was seperate from the frame and I know it is not columbus, and yes the tubing is round and normal shape. here is a link of what the frame looks like but I cant make out the tubing decal or if this frame has the same diamond pattern. this frame decals looks to be slx based on the colours of the stickers, my frame has no internal spirals in the seat tube at the bottom bracket. http://www.velomech.ch/images/rahmen/rahmen-52-7-g.jpg and here is another frame with the same pattern but with a different sticker on it http://www.velomech.ch/images/rahmen/rahmen-48-11-g.jpg (you can see the diamond pattern on the top tube.The spirals mentioned with respect to the steerer would be on the INSIDE, at the base.

Is that a columbus Aelle tubing sticker?

marty

yes it may be aelle but after looking at several of these frames on different web sites by velomech.ch there does not seem to be any rhyme or reason for the stickers that are actually on the frames except for the thron frames which have nicer bottom bracket (built in bridge) and nicer drop out. then I found another one with the diamond pattern but it says it is oria tubing (not much info on oria tubing on the web.) http://www.velomech.ch/image/cromo-steel-race-frame-black-olive-silver-53cm.jpg

yes it may be aelle but after looking at several of these frames on different web sites by velomech.ch there does not seem to be any rhyme or reason for the stickers that are actually on the frames except for the thron frames which have nicer bottom bracket (built in bridge) and nicer drop out. then I found another one with the diamond pattern but it says it is oria tubing (not much info on oria tubing on the web.) http://www.velomech.ch/image/cromo-steel-race-frame-black-olive-silver-53cm.jpg

Based on information from the Titan site and your frame style I believe it's CROMOR or THRON.

Anyway the ride is amazing. I climbed "The Wall" and it's stiff as a brick while climbing and smooth and stable going down the other side.

Here is a working link to a list of many older and some current Columbus tubesets:

http://mywebpages.comcast.net/bobequus/images/bikepictures/Columbus-tubes.jpg

"Frames built with EL/OS tubing are the lightest of all"

is this the same as Bianchi OX or OS tubing? I picked up (as in lifted, not bought) a late 80s looking Bianchi road bike the other day and was kinda astounded how light it was! The tubing decal just said "OX" (I think - it was dark out - maybe OS). Decal was down low on the seat tube near the BB.