Originally Posted by headwind15

Most of the time it is more about the motor being able to keep up with others rather than what the bike brings to the table. Now if you take a "heavy" lower end womens step thru frame and want to lower the rolling resistance, then by far, tire size should be the biggest consideration. There is an old saying that "saving a pound in your wheels is like saving 5 pounds in the frame": This morning I was out on my steel women's Bianchi with 700 x 35 tires, and had no problem "keeping up" with a friend on his 700 x 25 cc Dura Ace bike.