I've just bought a used , fairly modern, aluminium framed bike. It has no external welding showing, all joints are smooth. And it's fairly light, bike weighs about 10 kilos. I beleive the frame was bought and bike built by the private owner, so weight is obviously down to the components - and they are OK, but not the best. Frame was originally in a polished aluminium finish. I was told that it was built by a british firm based in Sheffield, England. This firm was owned for about 3 years by Bianchi before it closed. Does anyone have any information, knowledge to throw any light on this? There is , obviously, no name on frame but in the absence of any info I shall paint Bianchi on it - that should bring the Bianchi brigade out of hiding if they think I've got a rubbish bike ;-)