I am running 25mm tires on both my Bianchi and Emonda. The Emonda could go up to 28mm (depending on the tire) but no way WRT the Bianchi. My raw weight is around 165 these days (a bit too heavy but ...) and 75/80 pounds is as low as I care to go on these tires and the road surfaces that I ride on (country road asphalt in varying degrees of maintenance). The tires on my current bikes have over 50% life left and I have four still in the box Conti 5000's sitting on the shelf. So that experiment is not 'next on the list'. Latex tubes - different story.

dave