Originally Posted by
Hairy Hands
If your looking for faster rolling tires the width is not the issue, its more to do with the sidewall casing and tread compound the manufacturer chooses. Vittoria Rando Hypers are one of the faster rolling tires in a 35mm, but the fastest I've found is the Grand Bois Extra Léger Tires in 32mm. These are in clincher not tubular and of course tread or no tread does not affect rolling resistance unless its a cross type tire.
Depending on how big a Clyde you are will determine how wide a tire you need. You can probably ride a 23 pumped up to 200psi but the wider 42mm tire will be much more comfortable at 35 psi. And again width vs a fast tire are different issues. One is for comfort and one is for speed. You need to find a good comprise between the two.
I weigh 400 lbs and I alternate between 32mm Vittoria Randonneur Hypers (Now have a different name...Voyager?) and 40mm Schwalbe Duremes. I run the Vittorias at the full rated pressure of 90psi and the Duremes at 65/70 (front/back) where the max is 80psi. The Duremes are far more cushy and comfortable but the Hypers are way faster and sportier. If you are wanting a faster, sportier tire with less tread then I highly recommend the Vittorias. They come in 32mm, 35mm and 38mm sizes so there are options.