For the same tire width, I like 26" vs. 700c. Weigh less, less power to get them up to speed. Alternately, I can ride a wider tire on a 26" wheel than a 700c without additional weight penalty. Currently riding 1.5" Panaracer T-Servs (Kevlar bead) on a bike with 26" wheels, which I like a lot better than some 35 wide wire bead tires on my other 700c wheeled commuter.