Originally Posted by mapbike
Please correct me if I'm wrong here but I always thought that using a wider tire would increase rolling resistance + more wind resistance and possibly lower speed a bit rather than increase it........shrug????
Please explain where I'm wrong in this thinking if I am.
Yeah, wider tires definitely increase resistance. He probably means he expects more speed due to the increased overall diameter.
Personally, I doubt the speed gain will be anything but minimal going to a wider tire. The increase in overall diameter would be offset by the increased resistance.