Are they the most underrated part of the bike? I just upgraded my stock Bontraeger wheelset to Velocity A23 rims, White Ind. hubs, and Gatorskin tires. The tires went dorm 23 to 25. Just took a little test spin and it just seems like the bike rolls a whole lot smoother. Is it the hubs or the tires, or a little of both?

Whatever it is, I like it!