Who's the fastest?
Down a 15% grade hill at 50mph, or up a 15% hill at 12mph??
On the flats at 26mph with a tailwind or 18mph with a direct headwind?
Averaging 18mph for 60 miles on your own or 22mph for 40 miles in a big pack.
Best days are not my fastest, worst days are not my slowest

Let's face it I ride outside because I love it. Everday can bring new challanges.

I vote for "R600Dura-ace".. he claims to be faster then everyone in Prospect Park.. and invisible too..