I just purchased a tadpole TerraTrike Tour II Elite and I can't say enough about this particular design, make and model. I made myself keep going today, and was able to do 25.2 miles... my first time on the local bike path. What an exhilarating experience! I ended up at this page as I was curious if riding my tadpole is suppose to be easier than riding a conventional speed bike. A seasoned cyclist I met on the bike path commented that tadpoles are not faster. I know at one point she zoomed right by me, but then again, she is an avid bike rider... I am still green, just starting out.
Thinking it through, it seemed at first that the Tadpole would be faster, but then when I considered that there's drag from two front wheels and a wider mass in the front of the tadpole, it almost seems to me as the effort to ride either would be about equal, all things considered.
One thing that's for certain is that the tadpole is far more comfortable for a middle-aged gal like me. I also enjoy being able to see clearly what's in front of me without straining my neck. There's 27 speeds, so going up hills seems much easier, but when cruising on the open trail the higher gears are much more of a physical workout than the 18 speed I use to ride.
I highly recommend this model of tadpole. TerraTrike Rocks!!!