Rapid prototyping bike frame

Shoes, houses, PCB's, pretty much anything you can think of can be made (at least partly) on a 3D printer today. That also goes for bikes. Ralf Holleis diploma thesis was on making a custom bike frame with 3d printed stainless steel lugs glued together with carbon fiber tubes.
VRZ 1. a tack bike frame with 3d printed lugs from Ralf Holleis on Vimeo.
The fork is 480 g and the frame weight is 1100 g and it certainly looks good! On the topic of structural integrity of the contraption Holleis says:

I did a FEM analysis and from that point i started modelling. The parts are printed in stainless steel. The melted powder in the end is 99.5 % - 100 % solid. That means the material density is better than it is for castings. Because of that i am able to remove material on some points. Yes it is ridable:)

Holleis completed his thesis at: http://www.coburg-designlab.de/ And the 3d printed parts are lasercut on a concept laser machine from concept-laser.com