so i have this silly idea of making a "Serious" full suspension Mountain tandem,,In the Long term i want to make my own design to run a G-boxx gearbox sistem (later generation I guess) and I think I develope a even simpler sistem than the davinci design to run diferent pedal cadences,,,(again stage two)

anyway yesterday a friend Call me from Germany and offer me a deal I can just not pass out on Another M-pire Frame, even if I already have one of them at home...
http://patineto.smugmug.com/photos/25958866-M.jpg

well anyway in a few days one of this mega monster downhill bikes will be coming to my house
http://patineto.smugmug.com/photos/38310201-M.jpg

NIne inches of fully adjustable rear suspension, that I can control from about 5" to 9" and also raise and drop the bottom bracket height from 12" to about 15".
http://patineto.smugmug.com/photos/38310202-M.jpg

165MM wide rear spacing, absolutlly rigid and Bulletproff.
http://patineto.smugmug.com/photos/38310204-M.jpg

The heart of the monster, a single pivot design with a exelent linkage that makes the bike pedals like she was a 5" travel bike
http://patineto.smugmug.com/photos/38310206-M.jpg

anyway I have two choices, I can use the swingarm and linkages of the Nicolai and make my own Tandem frame (not much of a problem if is made of Cro-molly, that is part of what I do for my business) and with a little more efford I can get easton tubes and make the frame,, but what is the fun in that..

the Option number two is to "SomeHow" Attach the Whole Nicolai M-pire to a "PIggyback" Frame that will accept and secure the Nicolai frame with out any drilling, damaging or disabling the frame as a single bike, after all you can buy a nice motorcycle with the amount of money one of this Pretty things cost..

Yes... I see the tandem frames ussing S&S couplers that can be use a single, but I'm thinking and wondering about a design, that will let me attache the WHole Nicolai frame at the head tube of the Nicolai to the "Tandem" frame plus the necesary downtube mounts to act as a "Boom Tube" to generate suffient rigidity...


so the question is.....
anybody ever see a Single bike that can be attache to a "specific" made frame to make it into a tandem...?

I'm sure is being done,,, maybe never for a full downhill bike, but i be surprise if I'm the first person that ever come up with such a "Stupid" idea, (Hopefully in a Good way)

thanks in advance .

I'm looking for Links, pictures,, etc even inteligent arguments about the DO's and the Don't..

Thanks Ricky

Bike Friday makes a tandem that's convertible into a single road bike. Slightly less extreme though than your plan