T∇m Sherm∆n wrote:

This should solve the problem, though I imagine the price will be high:
http://www.seed-your-ideas.com/Triebwerk/en/index.html.

It would also make transporting and going through doors and/or up and
down stairs more easy with a SWB 'bent or tadpole trike.

Truvativ/SRAM have been making something like that for a while now.
I'm sure it is expensive but probably less so than Monsieur Schlumpf's
ingenious marvel.

http://www.sicklines.com/2008/08/21/...hammerschmidt/

Chalo