Originally Posted by
unterhausen
Most 'bents put you in a position that is similar to an upright position on a DF. An upright position on a DF will slow down a rider that has a lot of experience on a bike. This is probably part of the slowdown people experience when changing between df and 'bent.
+1 I think you are ignoring the bio mechanical part ot the equation. For the same level of effort I easily average 2-3 mph more on my road bike (which does not have an exteme position...seat and stem are pretty much level) than I do on my upgright commuter. Some of this is aero dynamics, but a lot is the position in terms of muscle use. And I am not going that fast (clyde and out of shape)
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