You have some mad Illustrator/CAD skills Pixel! I really like it! Nice to hear that the builder is a cool cat and might consider building some frames. Keep us posted please!
And a real good idea for a custom bike. Hmm i don't know if custom bikes have to break the bank. I'd like to think not, i guess the key would be to find someone who builds 'for the love of it' and that might mean that he won't necessarily charge a $4itload for building a bike of which he diggs the design. Or otherwise maybe have a few build in the far east.
As for your design itself, some questions and comments:
1. Why make a taller frame/bigger triangles? I see little advantages (but i am probably missing a few things) and some disadvantages, to wit:
-The center of gravity will be somewhat higher than necessary and this is one of the things that i love about Twenties and other such designs, they bank like mad, feel super stable and rather light because the weight is where you want it, close to the ground.
-The bike will be a bit harder to mount and dismount, no biggie though.
-The longer Steerer/front tube may mean your choices of fork are limited (just like with Twenties).
-The added strength is pretty much moot, you have to do some crazy a$$ things to mess up any properly designed and build 20 inch frame.
2. I really hope there is an (affordable) way you could make a bike like that folding! I ask because if so i might order a frame along with you...
3. Might it be an idea to contact BF, they sort off specialize in custom after all and they may have similair designs knocking about (Tikit?).
4. Have you considered including drops in the style of the Xootr Swift or the On One Sliding Drops frames? If i were to custom order any frame i'd want it to be the 'frame to end all frames' and for me that would mean i could ride it for another few decades during which i would likely want to try loads of different drivetrains.
Lastly i was curious, what do you hope this proposed bike will be superior in when compared to a Twenty. Things i think where (minor) advantages could be gained: Styling, tubing quality, handling/geometry, weight etc. What do you think?
Anyway, once again, great design and i hope it becomes a reality for you, the more small wheeled bikes in this world the happier i will be.
