Tommaso time trial. Columbus CROMOR.
 

This falls enough into C&V right?

Ok, as stated in the COD section, I've had a lead on this bike for some time now, and finally the fellow decided to sell it.
These will be the ''before'' pictures. Hopefully have some other projects out of the way soon so I can focus on this one.
Just a little dirty now, and could use new cables. Other than that it is a great piece.

http://i193.photobucket.com/albums/z...o/IMG_1051.jpg
http://i193.photobucket.com/albums/z...o/IMG_1055.jpg
http://i193.photobucket.com/albums/z...o/IMG_1056.jpg

Any ideas on the front hub? Phil possibly?
http://i193.photobucket.com/albums/z...o/IMG_1054.jpg

That is so coool, I love Funny bikes. Total speed machine. 700 and 650 wheels ??

Mmmmmm.........pretty, pretty, pretty! Nice acquisition!! :D

Great buy. A real time machine.

I'm surprised again to see yet another TT frame built with heavier tubing (Cromor). You would think that they would use at least Colombus SL for these bikes, but there must be a concious design decision to use the heavier tubing to meet the particular needs in time trials?? Are they looking at these bikes more like track bikes where frame stiffness is a big goal?

Chombi

Front hub is an American Classic. Cool bike!

CROMOR and SL use the same cyclex steel alloy, i.e., the tubesets weigh the same for the same physical spec. if you find a CROMOR tubeset to be heavier, then the tubeset is thicker gauge and/or larger diameter. in general, CROMOR had a heavier down-tube than SL tubesets, otherwise the tubeset specs were identical.

the difference is in production: SL is drawn over a mandel to create a seamless tubing, whereas CROMOR is rolled into tubes from sheet and then seam-welded into tubes. iirc...back in the day True Temper made *all* of their tubesets, even their best, via the latter seam-welding process.

Great looking bike - I also love the funny bikes for some weird reason.

Cromor tubeset is approx 1/2 lbd heavier than SL. The frame stiffness requirements for a largely constant and relativley low torque effort of time trial are less than for a typical road bike. Note that in the old Columbus catalog, they list that thier lightest KL road tubing (.7/.5mm) as suitable for time trials. http://os2.dhs.org/~john/catalogs/Columbus-tubes.pdf
The road bike needs to be able to sprint and climb well, so needs to be stiffer to withstand the higher peak torque. About the only time a TT bike sees much torque is at the start and turnout, and even those are gradual accelerations in comparison to a finishing sprint. A lighter (limper) frame on a TT bike wouldnt be much of a problem in terms of stiffness but the lighter weight also wouldnt really be any faster on a flat course. If there are uphills involved, a TT position bike is the wrong bike for the job anyway!
I would think that the selection of cromor was probably largely just an economic pricepoint decision, particularly since the performance of a TT bike would not be effected much by either a lighter frame or a stiffer frame. Spend the $$ on some aero wheels if you want to go fast.

+1 for American Classic hub ID.