Another thing came to mind that people tend to gloss over - the relative rolling resistance comparison is valid only at equal pressure. The thing is, large diameter tires are not available to contain high pressures such as 140 psi or more. Tubular tires are great because they can contain that really high pressure - more so than even an equivalent diameter clincher tire. The large diameter tires just can't go that high with today's rims, and tires.
What is really cool about tires like the Schwalbe KOJAK is that you can get it up to fairly high pressure (up to 95 psi) and it rolls and corners like crazy. They are also fairly light in weight (26X1.35 = 295 g; 700X35 = 330 g; 26X2.00 = 460 g). Don't think "mountain bike tire" or "beach cruiser" tire, think of the feel of a tubular tire without the harsh ride from super high pressure (even though it's a clincher).
Last edited by Mike Mills; 03-08-11 at 08:39 PM.