Help! I have one of those ideas that just won't go away. Modern frame, super light weight, based around a 3 speed coaster brake hub. A modern high-performance version of the old 3 speed Clubmans. This bike would be used for quick 20-50 mile rides on paved bike trails. There are some hills involved, but nothing to severe or long.

1) Should I go with carbon or titanium? ie: used litespeed or LOOK. My first choice would be the carbon, but my concern is that the carbon chainstay will not be strong enough for the coaster brake.

1a) What geometry would be best? I think Track would be too severe. How about TT, Tri, or just plain road. I want direct power transfer, for instantaneous acceleration and good climbing.

2) Is the coaster brake really the best option? Does an integrated coaster weigh less or more than 2 standard calipers, levers, and cable. I like the simplicity of the coaster and have the skills to use it effectively.

3) Has anyone seen anything like this before, or done it themselves?

4) Any other considerations that might cause problems, or improve upon the basic concept?

I posted this in C&V because you guys are probably the most likely to get it.

Please discuss...