I included cross bikes in the mountain category cuase I didn't want people to think they are like comfort/hybrid bikes. Far from it. Cross bikes are designed for a very specific purpose - generally for serious rides on paved road and trail. I see alot of cross bikes doing the fireroads up in the mountain. Gearing is generally alittle lower end (ie more granny than racing) than road or hybrid bikes and geometry is quite different from hybrid bikes ( it is more agressive like a road bike). But if someone rides rail trails or old roads, a cross bike is perfect!