Hello
I own a D'Fly and have ridden a Tetra. My Wife owns a Tetra and I have traded bikes with her on rides so I could compare the two frames. We both use same pedals, wheels and tires.
I think the D'Fly descends very well,givin good wheels, tires and brakes, the rider is the only limiting factor. I got my D'Fly up near 60 miles and hour coming down Copper Mountain near Vail Colorado, best high speed decent you could ever dream of!
There is no comparison going up hill, the D'Fly is faster feeling and of course faster because it is lighter in weight by no small margin. The only thing a Tetra does better is in smoothness and shock absorbing, but if you use smooth wheels and tires this differences becomes very small. An example of very smooth wheels would be Topolino's with michelin race pro tires. Once the wheel, tire combo is real smooth and shock absorbimg the difference in frames regarding smoothness and shock absorbing is nil.
So with the right wheels, tires and of course the miracle saddle the carbon railed Fizik Aliante the D'Fly really shines at its best.
I have ridden sense 1971 and have been a cat one racer. Rode the Furnace Creek 508 last year.
Regards Robert
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