I would say either Tube defect from the tube manufacturer Overheating during the brazing process with a lug having a ID too large and out of specification
The small crack coming out of the large upper crack is puzzling The lug seems to have excessive space to the tube Second the suggestion to contact RBW, but as 2nd owner???? John Hawrylak Woodstown NJ On Sunday, March 6, 2016 at 5:27:28 PM UTC-5, Edwin W wrote: > I was performing a very rare bike cleaning and saw a bit of a chip in the > paint of the headtube on my Sam. It is a 60cm, single top tube orange one > with side pulls, if you are interested. I am the second ownder and have put > 5000 or so miles on it over the last three years. > Can you all take a look at the two photos posted here > <https://www.flickr.com/photos/90785999@N06/sets/72157665396088401> and > let me know what you think? > Is it a crack? Yes, it looks like that. It is right where the point of the > lug is, which must add some kind of stress? Metallurgists and engineers > please chime in. > What to do about it? Replace the head tube? What size of a job is that? > Does every city (even a not very bikey city like Nashville) have someone > who could do this? > Any other wisdom would be appreciated. > > Why does steel have to be THIS real? > > Edwin > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at https://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
