I posted a thread in Framebuilders here, asking some questions about a frame I might be able to look at over the weekend; I guess they're having a couple of slow days in there, so I thought I'd ask here, too.
It sounds like it was handwelded/brazed by the seller - It might be made from Columbus SL - and it might be in my size range ( I need to measure the TT ).
What might be some things to look for that could indicate potential issues with the frame? Its painted, so is it hopeless? I don't think there's a BB in the frame, so I might be able to see the some of the guts of the frame through the BB shell.
The hierarchy appeared to get a little more complex in the 1980s but the catalog describes SL thusly: All-purpose, high-performance tube set for road races over even terrain. Double-butted tubes. Cold-rolled fork blades.
Cyclex Steel - Weight: 1925 g
Thanks for the link to the Columbus spec sheet; it sort of confirms what I thought re: the quality level of SL.
are you aware of any external/internal characteristics that are present in a Columbus tubing set that might indicate its quality level? Granted the frame isn't that expensive, but i'd still be curious to know a bit more about it.
Too bad it's painted. You could get a better look at the brazing - but look at the joints anyway and make sure they don't look sloppy or starved. Lug thinning is a good indication that the builder took some time with the frame. Also feel for the ST and DT ends inside the bottom bracket - are they radiused, cut square, or do they feel too short? May help you in determining the builder's care.
i'm going to take a wild guess that you mean "lug thinning" to mean a gradual tapering of the lug as it lengthens. Is that correct? i know i've seen a couple of photos here of lugs that become slightly thinner vertically as they progress, say, from the the head tube towards the seat tube.
thanks a bunch for the replies. i really appreciate your help.