I haven't noticed any comments here about switching tires and rims, for different kinds of riding. I ride a vintage GT Xizang mountain bike. For off-road trails and such, I use Continental MTB knobby tires, 26x2.4". For road I'm using Schwalbe Marathon Plus 26x1.75 road tires (thanks to suggestions from the Touring thread here). Easy enough to swap out wheels and tires. Wheels are Mavic 717s with Shimano XTR hubs and 9-speed cassettes.
My challenge is, to make sure I have a spare tube on board that's appropriate for the tires I'm running that trip out. Oh yeah... I carry a tire pump rather than a CO-2 inflator. Old fashioned, but it gets me by.
So how many of you guys and gals swap tires and wheelsets around? Am I the only one here? Or is it just that I'm the only one using a mountain bike for road, touring, and recreational riding as well?