You can make anything work, but purpose built DF touring bikes over the last 100 years have tended to relatively low bottom bracket heights vis-a-vis their tire size.
Originally Posted by
DVC45
The reason I asked, is because I am thinking of building a tourer, based on vintage MTB.
Remember, a vintage mountain bike frame was most likely nominally designed for 26x2.25" (559x55~57mm) tires. If you fit 26x1.375" (559x35mm) tires - which would still be wide-ish as road touring tires go - the bottom bracket height would drop almost an inch (~20mm).