Alright guys I went and rode the giant roam and the ds2 they both rode well I'm thinking about the giant more though, but the guy at the shop brought up the idea of getting a mountain bike and throwing different tires on it in case I ever wanted to get into mountain biking the frame would hold up. Does anyone have any thoughts on this? Good ? Bad? Indifferent? I'm not opposed to the idea just not sure how a mountain bike would handle with road tires on it.