Sawtooth... don't get me wrong, that 21-25 is not for very long. lol no way could i sustain that speed and talk to a buddy beside me...
i'll tell ya... one thing i've noticed is that when i ride 20 or so miles on single track, it goes by alot faster than riding road. not sure why.... maybe becuase it's my first love. who knows...
oh, and i'm one of those commuters that likes to beat the last time... even though, sometimes it's just not in me.
Rich
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Bikes: C'dale, Trek, Cervelo and Santana