My friend is in the market for a new bike. He is 6'5 325 pounds. He plans on using his bike for commuting as well as exercise and group rides. He doesn't plan on racing, but would like to be able to ride with a fairly fast group, 20mph on flat roads. Would this bike work for him? His concern is that being his size that he may be too much for a "road bike". Thanks in advance for your replies.