I rode a century this September on my Giant FCR3 hybrid (with 28s) which looks similar to the Quick. It's definitely doable as long as you are comfortable on the bike and you do the distance training. The first few 50+ mile rides will tire you out, but after working up to it I can now ride 60-80 on a regular basis without much difficulty as long as I fuel. A road bike would make it all a bit easier but you don't need to spend the money to accomplish your goal.