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how will smaller tires affect my speedometer
If the tire diameter is reduced by two centimeters, the speedometer will be accelerated by about five kilometers. The following factors need to be considered when refitting tires: 1. Local traffic regulations (will not affect the passing of vehicle annual inspection, vehicle warranty, etc.); 2. The speed and load index of the tire; 3. The specifications of the rim, such as: width and offset etc.; 4. Space; 5. The suspension system of the car; 6. (Important) The load-bearing radius of the tire remains unchanged;
The size of the car tires affects the acceleration, stability and fuel consumption of the car. There is a complex relationship between tire size and driving speed. Even if a small-displacement car is replaced with a large tire, it will not be able to run due to insufficient power. If the tire is too small for a large-displacement car, the power output will be limited and the speed will be affected. Automobile tires are one of the important parts of automobiles. They are in direct contact with the road surface, and work together with the suspension of the automobile to ease the impact of the car while driving, ensuring that the car has good seating comfort and smooth driving; ensuring that the wheels and the road surface have good adhesion; improve the traction, braking and passability of the car; bearing the weight of the car, the important role played by tires on the car has attracted more and more attention.
The size of the tire mainly depends on the hub. Large-sized hubs are generally matched with low-profile tires, so that the entire wheel has a higher cornering stiffness, that is, the vehicle has a higher lateral stiffness than ordinary wheels under conditions of high-speed cornering and other large lateral forces. Small deformation, thus improving handling sensitivity. However, the excessively large wheel hub makes the flat ratio of the tire too small, and the comfort is poor, and the wheel hub is easily damaged by impact deformation due to insufficient tire shock absorption when driving on bad roads. Generally, the speed displayed by the speedometer is calculated by the rotation speed of the wheel axle and the original wheel diameter. If the tire size is increased, the speedometer shows 80KM, and the actual speed should be 80 times the actual diameter/original tire diameter. The wider the tire is, the larger the ground contact area is, the larger the contact area is, the greater the friction force is, and the greater the friction force is, the greater the power required to reach the required speed will be than the narrower tire. The wider the tire, the smaller the contact area with the ground, the larger the contact area, the smaller the friction force, and the greater the friction force, the smaller the power required to reach the required speed than the narrow tire.
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