We are working on a TT bike, I made the odd post on that already in our forum.

When I designed the Silvio I restrained myself to the rear half and got it done ok in a few months, I used a sofrider front end. This time I'll do the same thing on the rear for the new TT bike and just hook it up to a Silvio front end. Doing the new rear should be not too difficult from here as I have a production drawing. (Although to be fair to oneself, I started drawing this kind of bike a long time ago and there have been many attempts and re-attempts!)

We can tinker with the Silvio, but we can't lay the body back more which is the main thing for reducing drag. This will happen with the new bike. It will go back further, but not as much as what you find on a low racer or high racer because we still need to have the body activated, not flat out lying back. The new design does away with the tubing below the seat in favour of a structure that takes its inspiration from an I-Beam running from the down tube to the back. The seat pan will provide the upper flange of the beam and the chainstays will provide the lower flange. This will be more aero than the Silvio undercarriage (which is already very good). People say that you can't get proper aero without going down to 25 degrees. When all the bikes you look at have beams running under them to support the RWD, that may be true. But here again cruzbike shows its difference. We dont' have that lateral flex to take care of, so our structure options are wider and we can deliver the requried aero profile without laying back so far.

We have to do a new fork so I am looking at springing for some carbon fork blades and a new splayed crown. With care the same mold should be good for left and right blades.

Then bolt the frame up to a Silvio front end and go testing! Should be heaps of fun. :)