Various Bicycle Racing Equipment

（1） Track bike
The bicycles used in the field competition are only equipped with one gear and have no brakes. Track bicycles cannot use live flywheels, transmissions, and braking devices.
（2） Mountain Bike
The total length of the bicycle shall not exceed 185 centimeters, the width shall not exceed 50 centimeters, and the weight shall not be less than 6.8 kilograms. The length of the seat should be between 24-30 centimeters, and the distance between the center axle and the ground should be between 24-30 centimeters. The diameter of the front and rear wheels of the bicycle must be the same. The maximum diameter of the wheel is 70 centimeters and the minimum is 55 centimeters. It should be a dead flywheel and should not be equipped with a transmission or brake.
（3） Highway bicycles
Road bicycle tires are narrower than regular bicycles and have a high tire pressure. Using materials such as titanium alloy, carbon fiber, and advanced aluminum alloy, the weight of road bicycles is very light, but participating in racing should not be less than 6.8 kilograms.
（4） Small wheeled vehicle
Small wheeled vehicles are divided into freestyle BMX and racing BMX, with the main difference being the position of the front mounted headset. The freestyle scooter has a special component that can rotate the front of the car 360 degrees, while the racing scooter cannot.