I don't do triathlons because, after many years of mega running miles, my knees encouraged me to find other aerobic exercise. However, for long highway rides and closed courses, I much prefer aero positioning and tri and TT bikes to traditional road bikes.
Here are a couple of examples:
My 1996 Scott Waimea. I picked up the frame and wheels, and built out the drive train. Almost vintage in the tri world, but it has the basic characteristics of a dedicated tri bike.
Here is my Nashbar Aero Sprint. If nothing else, this bike is very interesting. I presently have it set up with a single 49t chainring. It is much easier to ride than the usual rap you hear about funny bikes. I like to use it for short hauling ass training runs (10-20 miles) around town. I have been told that funny bikes are sometimes seen on tri course.
