I'm not quite sure what you mean "how does that carving work?" It's not a functional piece. The head/top/down tubes are joined by fillet brazing, which in your case is expanded well beyond the tube junctions. Then excess braze is removed, by files/sandpaper/emery cloth etc., and the edges that are left resembles the shoreline of a lug. It's an appearance thing only, no function.RJohn said:thanks Dave. how does that carving work?
It was a lot of work but the reason that Serotta did it was because the CSi was their flagship and it featured lugs. The next bike down in their line was the Colorado III; great bike, less expensive and didn't have lugs. So the extra work was done to keep the differentiation between the two.RJohn said:OK. Now I get it. Sure seems like a lot of work though. No wonder I have never seen this technique before.
David Kirk worked at Serotta for about 10 years. Built a lot of famous race frames and was also the head of Serotta's R&D. Did a lot of good stuff while he was there and now has his own shingle: http://www.kirkframeworks.com/ . A really great guy. Builds bikes too.:thumbsup:RJohn said:Thanks to Dave and David. I can understand the process much better now. David, you seem to have a lot of knowledge about this technique. Did you work at Serotta? When you say we, I'm assuming that you did.
The Big Man Dave T nailed it.RJohn said:Thanks to Dave and David. I can understand the process much better now. David, you seem to have a lot of knowledge about this technique. Did you work at Serotta? When you say we, I'm assuming that you did.