Is it related to the fact that road bikes are faster than mountain bikes?

The greater the contact surface between the tire and the ground, the greater the friction, but it also generates too much drag, which consumes kinetic energy and inertia. When the bicycle is in horizontal motion, positive pressure = gravity, which is what you call the kinetic friction factor. But why a road bike is faster than a mountain bike is a lot more important than aerodynamics, geometry, and many other factors.

Here are a few reasons why:

1. The body is heavier, the mountain bike has a very strong and sturdy frame, a fork shock absorber, and even a rear shock absorber, a wider car, because of the complex road surface ridden and the use of thicker rubber tires, in order to achieve better braking effect, mountain bikes are designed with more complex and efficient braking devices, which virtually also adds more weight. Road bikes, on the other hand, are designed to reduce weight, from the frame to the tires, with very narrow, relatively thin tires designed to reduce weight and friction by reducing the contact surface with the road.

2. More efficient frame geometry, in order to have better stability on mountain bikes, the main focus of the rider is on the handlebar, saddle and pedals, forming a triangle, but the handlebar height is basically higher than the saddle. However, the handlebars of road bikes are parallel to or lower than the saddle, which can lower the center of gravity, reduce drag more effectively, and improve inertia.

3. Wheel diameter, mountain bike wheels in order to improve the effect of passing and instantaneous start on various road surfaces, the wheel diameter is much smaller than that of road bikes, and now the general mountain bike wheel diameter is 26 inches, inches and 29 inches, but the diameter is not as good as the 700mm diameter of road bikes. Because the road surface and the field on which the road car runs do not need to be considered.

Therefore, the ground contact area is indeed one of the important factors for road bikes to run faster than mountain bikes.

Road bikes are lighter than mountain bikes, and with thin tires and less friction in contact with the ground, they require less physical effort on the part of the rider. In addition, the gear ratio of road bikes and mountain bikes is different, the crankset at the front of the road bike is 53t and 48t, the rear flywheel is about 8t (11t), the 32t mountain bike crankset is 44t 32t 24t, and the rear is about 11t 34t, that is, the maximum speed ratio of road bikes can reach more than double, that is, the foot steps on a circle, the wheel turns more than 6 and a half times, and the mountain bike is only 4 times at most. In addition, the rim of a road bike is 27 inches, and the rim of a mountain bike is 26 inches, so the circumference of a turn is also different.

Of course, it has to do with it, mountain bikes have a lot of friction and are bound to be slower.

1. In a short period of time, for short distances, the speed of mountain bikes and road bikes is about the same.

2. But if the distance is more than 10 kilometers, the mountain bike will definitely not be able to match the speed of the road bike. After all, road bikes are designed for speed.

3. Even a basic entry-level road bike is about 5kg lighter than the mountain, which is very fatal for long distances. It can be said that the longer the distance, the greater the gap. Road bikes travel lightly; The mountain bike has more than 5kg of resistance, and the gap is naturally larger.

In addition to the weight, the difference between the gearshift and the wheels is also very large.

A road bike, of course, and a road bike is all about speed.

Road bikes are designed to race, while mountain bikes are designed to be off-road. It's like Mitsubishi off-road and F1 speed.

First, the weight of the whole car is different, F1 is heavier than Hummer, and it is easy to know who is heavier.

The second gearing system, the crankset element and flywheel of the road bike are smaller than those of the mountain bike, the same pedaling frequency, the crankset of the road run is larger than the gear of the smallest flight, and the number of wheel movements is more when the pedal pedals are pedaled.

The third tyre uses slick tires for road running, and the diameter of 700c tires is about the same as that of mountain bike 26*, but the former is only about 1 3 of the width of the latter.

Fourth, riding position, road bikes in order to just play the limit of the strength of the thighs, and mountain bikes also need to consider good off-road complex road conditions.

To sum up, there is a difference in speed on ordinary road surfaces.

On the other hand, in off-road conditions, road bikes can be difficult to walk!

If the roads in your place are all bad, buy a mountain bike, if the roads are flat, if they are not broken, buy a road bike, and now you can say that the roads in every place are flat, and what do you want to buy a mountain bike? I still think the road bike is good, if you think the handles of the road bike are horns, you can change it, and it's only 20 yuan.

The riding posture has low wind resistance, small tire friction, and the weight of the whole vehicle is light!

1. The wheel width is thin and the wheel resistance is low! Save labour!

2. The roulette wheel ratio is not the same! The standard maximum number of teeth on a road bike is 56, and the minimum number of teeth in the back is 11! The maximum allowable number of teeth is 42 as standard for mountain bikes!

The minimum number of teeth in the back is also 11! So you pedal a lap and the rear wheel has a different number of revolutions! Don't you see that the pressure plate of a road bike is bigger than that of a mountain bike!

I'm just saying the maximum standard of mountain biking! Its practical use is a pressure plate with 38 teeth!

Otherwise, it's called "highway", one is that the wheel resistance of the highway is very low, you can know it when you see his thin wheels, and the other is that the car is light on the road. There is also a change of speed, according to my observation, the pressure plate of the road is larger than that of the mountain, of course, there is a corresponding flywheel (I don't know if this is right, but the cars I see are bigger than mine, hehe!). ）

Of course, it depends on a person's physical strength and endurance! Got it!

It's like a couple upstairs said.

The wheels are thin and the resistance will be low.

There are also different proportions of the roulette wheel, which will save effort when riding.

Of course, there is also the issue of riding position.

Of course, the main thing is that the bike is lighter, because it has fewer forks than mountain bikes, which means that the front shock is a lot lighter.

And the road bike has a slimmer frame, and between strength and weight, there is a kind of high-speed mountain bike, which is to replace the shock with a hard fork, and it is also to reduce the weight.

Road bikes are much faster than mountain bikes, and there are no real numbers as to how much faster. But the speed of the road can exceed 100 kilometers, which cannot be done in the mountains.

As for the big difference in speed, it is also related to the characteristics of the two cars, which you will pay more attention to.

First of all, road bikes are lighter than mountain bikes. Because the most important thing about road bikes is speed! Mountain bikes need to adapt to a lot of road conditions, and the pursuit of off-road performance in addition to speed!

The design concept of the two cars is like this, and with the development of the times, the bicycle has become very simple!

Also, if you want to buy a bike and you are a newbie, it is highly recommended to buy a mountain bike. Because comfort and everyday practicality are better than road bikes!

The speed is equivalent to the difference between an off-road vehicle and a sports car...

Features are also sports cars and off-road vehicles.

Sports cars can't go to mountain roads, they are completely born for speed, and road cars are also built for speed.

Compared to the mountains, it is more of a panacea, and you can change the tire on the road. Change the mountain and then change it.

Of course, road bikes are faster, because road bikes are lightweight, and mountain bikes are heavier than road bikes, and mountain bikes can be ridden on roads, but road bikes can't be ridden in the mountains, depending on your needs.