Because the MTB is meant to be able to take jumps and bumps, and has to be stronger because of that. The road bike is expected to travel on smooth roads, which means it can be weaker and lighter.
In addition the suspension fork and rear shocks (if fitted) are heavier due to the moving parts and need for a rigid design. These forks will usually have oil and sometimes springs fitted too. Lastly the rims need to be stronger and normally wider which involves more material in reinforcement.
Basically to make something tougher requires more material and more material means heavier.
A road bike is faster on the road than a mountain bike. That's all
On average, a road bike is faster than a mountain bike by about 25 due to its lighter weight and smoother tires.
Yes, it is possible to put road tires on a mountain bike. Road tires are typically narrower and smoother than mountain bike tires, which can improve speed and efficiency on paved surfaces. However, it is important to ensure that the road tires are compatible with the rims and frame of the mountain bike before making the switch.
because the traction on the mountain bike tires have more of a grip to be able to ride on a mountain when a road isn´t that hard to ride on and to need more traction.
A mountain bike is basically a bike meant to be strong enough to be ridden off road. It's overall stronger and has wider tires than other bikes.
A road bike is generally faster than a mountain bike due to its lighter weight, smoother tires, and more aerodynamic design. Road bikes are designed for speed and efficiency on paved roads, while mountain bikes are built for off-road terrain and have features that prioritize control and durability over speed.
Don't know what you mean by a MX bike.
It is hypothesized that a road bike with a streamlined frame and lightweight components would be faster than a mountain bike due to its lower weight and aerodynamic design. The road bike's thinner tires and more aggressive riding position may also contribute to increased speed compared to a mountain bike, which is designed for off-road terrain and features wider tires and a more upright riding position.
A mountain bike is basically a bike meant to be strong enough to be ridden off road. It's overall stronger and has wider tires than other bikes. Montague Paratrooper Mountain Bike is a bit special in that the frame folds in the middle, making for easy storage and transportation.
Question doesn't quite make sense, as Mountain Biking is also an Olympic sport these days, meaning there are Olympic mountain bikes. I guess you are talking about road bikes vs mountain bikes. Road bikes are more efficient - for road riding - because they are lighter, have lower rolling resistance, a more aerodynamic riding position and doesn't lose any pedaling energy to suspension in the frame or fork. It's not really a fair comparison though. A MTB ridden off road will be more efficient than a road bike ridden off road.
Depends what laptop and what mountain bike and the deals you're getting for them.
Mountain bikes usually have much wider tires than road bikes, so they have wider tubes as well. Trying to fit a MTB tube inside a narrow road tire is a challenge. Also, MTB wheels are usually smaller than road wheels, with the corresponding change in tube overall diameter.