That Jamis Commuter can very well transport you on longer distances. However, like Andy_K said, it will be a butt challenge. The longer the ride, the more your butt will feel the pain. Just from being a touring cyclist, all I can say, is that, the feeling of discomfort soon becomes translated into pain. Eventually, you'll begin to feel practically all the bones in your body. You'll begin to crave more stops, more frequently. At least bar ends would help to alleviate pain in your hands, due to varied hand positions.