Riding posture in road race is not aerodynamic enough. Wheel resistance is not a problem. You can replace the 29er frame with a bald tire, or install a road wheel set. Weight, at the same price, mountain bikes will definitely be heavier than road bikes at the same price, because mountain bikes have shock-proof front forks. Maintenance costs will also be more expensive than road vehicles. 200 yuan is required for a single front fork, and the maintenance of the whole vehicle is about 400 yuan. If it is a soft-tailed mountain bike frame, the front and rear shock absorbers 400 yuan, the turning point 200 yuan of the whole vehicle, the transmission and the wheelset 200 yuan. Basically, I go out to play with mud in rainy days. The maintenance of hard-tailed mountain bikes is about 400 yuan, and the soft-tailed mountain bikes are about 800 yuan.

The research results of modern sports medicine show that the functions of cycling mainly include:

1. Develop the brain. Because cycling is an opposite movement, it can improve the agility of the nervous system. Legs alternately pedaling can develop the functions of the left and right brains at the same time, which can effectively prevent premature aging and neglect of the brain.

2. Improve physical fitness. Because cycling can effectively exercise the muscle strength of lower limbs and enhance the whole body endurance. Moreover, through comparative study, the endurance exercise effect of cycling on internal organs is the same as that of swimming and running. Because this exercise can not only effectively exercise 3 pairs of joints and 26 pairs of muscles of lower limbs, but also effectively mobilize the muscles, joints and ligaments of neck, back, arms, abdomen, waist, groin and buttocks. Keeping the correct riding posture and riding for a long time can obviously improve male sexual function and strengthen the strength and durability of erection. A special survey shows that people who ride bicycles for about 6.5 kilometers every day are 50% less likely to suffer from coronary heart disease than those who don't ride bicycles, and the erection time and erection quality of male genitals are improved by 30%-70%.

3. lose weight. Because in cycling, the human body carries out periodic aerobic exercise, so that the exerciser can effectively consume more calories. According to scientific research, riding a bike for half an hour can burn about 150 calories. A person weighing 75 kilograms can lose half a kilogram by riding 73 miles at a speed of 9.5 miles per hour, but he must persevere every day and persist for a long time to get a significant weight loss effect.