Hi fietsbob (from NL i am guessing! - I spend 5yrs in Nijmegen!),
I was thinking I couldn't go too thin with tires on the stock wheelset, not even sure a 28 (which I was thinking would be good for light/gravel/road) wouldn't be too thin. Shows how much the 'newbie' label applies to me in my profile! Of course there is the issue of taking off tires and putting on new ones.
Roger