Hi what is the best to use for commuting mountain bike or road bike. I live about 13 kilometres from work a total of 26 kilometres per day. I do not have time for training/cycling during the week therefore try to commute at least 2-3 times a week to work. Is it true that 13 kilometres on a mountain bike is equivalent to 26 kilometres on a road bike? At the moment I'm using my road bike to work as I intend to purchase a Scott entry level mountain/commuter bike for R3500.