As a mountain bike rider, I've often wondered if riding on the road is more challenging than off-road terrain. After some research and personal experience, I've concluded that it can indeed be harder due to a few factors. Firstly, mountain bikes have wider, knobbier tires which can increase rolling resistance and decrease speed on pavement. Secondly, their suspension systems are designed for rough terrain, making them less efficient on smooth surfaces. Lastly, the more upright riding position can be less aerodynamic, causing us to exert more effort to maintain speed. Overall, mountain bikes are not the ideal choice for road cycling, but they can still get the job done if necessary.