cyclocross bike for sharing
So my parents spend their summers around Bozeman, MT and have many visitors while they're there (including me, the main biker in the family). The house is up a pretty long gravel/dirt road and driveway on the side of a mountain/large hill. They currently have a couple basic mountain bikes, but I've been put in charge of getting a bike more suited for road riding. I was thinking a cyclocross bike would fit the bill well, since realistically it'll get ridden more if people feel comfortable leaving directly from the house and going down the hill on the gravel/dirt road, but I might get an extra pair of road tires for those motivated to drive out to go on a true road ride. Here's the issue. I'm the tallest person in the family at 5' 8", but we'd like to get something that a taller visitor could also conceivably ride after making only minor adjustments (i.e., the saddle height). We're not looking to break the bank here and I don't imagine anyone will be doing any real aggressive trail riding with it (they'd use the MTB for that), so maybe a cyclo bike isn't necessary at all. Any general suggestions or specific suggestions for a bike that might have more flexibility re sizing?