I've been very happy racing the GT time trial bike, but always liked the idea of having a compact steel TT machine, and then I got
thinking about doing a one piece aerobar/fork with dual 700C wheels, and the thought turned into a CAD design, and a few months later into a bike!
I ended up having to design and build both brakes too, as nothing available would fit. I got some fancy Dedacciai butted tubing for the down tube, top tube, seatstays and chainstays, then custom butted some tubing for the seattube, headtube and bottom bracket shell. Various ovalising was done, and the frame fillet brazed together. The fork uses butted tubes, with a taper on the blades, again ovalised right down. The lo-pro bars come out from the fork crown with a sleeve to reinforce the aerobar pad supports. The aero extensions are aluminium and bolt on. All cable routing is internal. The surprising thing was just how light it came out - the frame including integrated seat mast is 1500g, with the fork/bar/aerobar at 1020g including the pads.
Now just to ride it and see if the new lower/shorter position makes me faster.....
Here is the original CAD design:
Compare with the finished bike: