Taking the displacement as the measurement standard, generally, the larger the displacement is, the larger the tire specification will be. Of course, the tire specification will directly affect the comfort, beauty and passing performance of the whole vehicle. The international standard tire code indicates the percentage of section height and flat ratio in mm. The displacement of small car is between 0.8-1.5. Accordingly, its front tire specification is applicable to the range of 155 / 65r13 73t -- 175 / 70 r 14 77h. The size of the front tire is small, so the friction between the front tire and the ground is reduced during driving, so it is more economical in terms of fuel. This is also the main reason why most consumers choose small displacement cars, but the resulting negative impact is that its limited tread diameter will greatly reduce its Trafficability and comfort, When driving a small displacement car over a ridge, you often have no bottom. Small tires make the steering gear lighter. In most small displacement cars, power steering is not equipped. The displacement of large cars is between 1.6-6.0, and the tire specification is in the range of 185 / 60 r 14 -- 245 / 50 r 18. Large size tires will make the whole body look domineering. Good adhesion to the ground ensures its acceleration performance and body stability at high speed. Some special off-road vehicles and modified racing cars have different front and rear tire specifications. Generally, they are designed with small front and large rear. If it is a four-wheel drive model, it will also involve the problem of inter axle differential. Because the front and rear wheels are different in size, the driving of the car will be affected, When the car is walking on the ground, it will take longer for the rear wheel to turn around than the front wheel, which will affect the normal movement of the front and rear axles.
