Originally Posted by Dan333SP

Trek had a Y-frame bike of similar concept (but without the suspension effect on the seat) in the late 90s. I passed one while riding in Miami and had to do a double take. Pretty sure the UCI banned them for time trials, but they may still be legal in triathlons?

Edit: This is relevant-
http://www.bikeforums.net/road-cycli...giant-mcr.html