Mountain Bike On Road. If use your mountain bike to commute on long, flat stretches, it works better than a road bike on slick rock, but not by much. A mountain bike commute just sounds really appealing next to sitting in traffic in a car.
This is also for a reason. A mountain bike commute just sounds really appealing next to sitting in traffic in a car. Mountain bikes were designed for the wild trails.
Mountain bikes were designed for the wild trails.
Road bikes are optimized for pavement, so you can't use them in the mountains.
Riding a mountain bike on the road may seem out of place, but it's actually quite common. Ride the bike that you have, there's no reason not to. I know that choosing MTB tires that are suitable for roads AND trails can be a confusing process.