Custom TT

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:


Frame: Custom built steel TT, integrated seatmast
Fork: Custom built steel TT, intergrated bars/aerobar
Headset: Chirs King 1" NoThreadSet
Seatpost: Integrated, Control Tech clamp
Saddle: Selle Italia Flite
Brake Levers: Vision TT
Gear shifters: SRAM Force bar-end
Brakes: Custom single pivot front, Custom scissor action rear
Bottom Bracket: Shimano Dura-Ace splined
Chainset: Shimano Dura-Ace 170mm, 42/56
Pedals: Speedplay X1
Chain: KMC X-10SL
Front Derailleur: Shimano Ultegra
Rear Derailleur: SRAM Force
Cassette: Shimano Ultegra, 11-23 10spd
Front Wheel: Zipp 404
Rear Wheel: Zipp Disc
Tyres: Vittoria tubular
Wheel skewers: Tune Airline
Computer: Cateye wireless

Weight: 15.75lbs