"Wider tires roll easier, yield higher mileage and offer more comfort and grip." Continental Tyre
Wider is faster!
The truth about rolling resistance:
Wide tires offer more control, more comfort and more fun. While this has become more widely accepted over the past few years Sport Scientist Peter Nilges, was not too interested, he was more concerned with speed. The avid, German League road racer wanted to determine the best tire width and air pressure combination for fastest performance. He completed 300 test-rides with SRM cranks to establish the exact energy consumption for his thesis “Road Rolling Resistance”. He tried three different tire types in three widths at 20 psi, 30 psi, 45 psi and 55 psi on road, dirt track and cross-country The results were clear. Higher pressure was only faster on the road. Off-road rolling resistance was lower, the wider the tire and the lower the pressure. This was similarly true for dirt tracks, soft forest roads or cross-country and up to 40 Watts could be saved in extreme off-road conditions; poor acceleration caused by higher tire weight being generally compensated for. Explanation: A tire at low inflation pressure adapts better to uneven surfaces. It sinks into the ground less. Overall it suffers less retardation.
Schwalbe Tyres
In fact, on all but the most perfect, newly-paved surface, a wider tyre at lower pressure will be faster -- not to mention more comfy -- than a narrow, high pressure tyre. Unfortunately, the "high pressure, narrower = faster" orthodoxy resists all other information to the contrary in many circles.
Even the racing peloton is moving away from ultra-narrow tyres for everything but time trials, where the aerodynamic argument holds some weight at speeds of 50 kph. Unless you regularly travel at these speeds on smooth surfaces, you will be much better served by a tyre in the 28-40mm width, run at pressures from 90-50 psi.
Tyres like these (asuming they are well-constructed) will be fast if not faster than narrower tyres on the kinds of surfaces most of us ride. As stated above by manufacturers and testers, wider tyres absorb irregularities, rather than bouncing and slowing progress, while pounding the rider in the process. all this is wasted energy that could produce forward movement
Personally, I love the ride of
my Bleriot, especially when I clad it in the incredibly fast 650 X 42b Grand Bois Hetre,( patterned after the legendary hand-laid French tyres of the 1930s) which has become one of the most renowned "demi balloon" tyres today.
Sure, I occasionally run 700X23s @ 100psi on my other bikes, but I don't find any real speed benefit and they certainly don't come anywhere close to the plush Hetre when it comes to comfort.