Originally Posted by
makeinu
Just to clarify. Is Rubin's Brompton all titanium or is it just that if you strip the steel Brompton down it ends up being about 23 pounds so shaving another 4 pounds by using titanium bits gets you down to 19?
I think that his prototype is now down to something like 17 pounds and is all titanium. Although that would depend on whether you are talking about the Rohloff model or the triple with 9 sp cassette in the rear.