[QUOTE=Mountain_Owl]Being a noobie, I'm curious: How is skinnier better for an off-road tire...or any tire?[/QUOTE
Probably worse for off-road but better for on-road. The 1.25x26" 90psi tires on my tandem are MUCH BETTER for riding on paved roads than the 1.75x26" 70psi tires that came on the bike. Less rolling resistance, zippier, lighter, etc.