What Does Rear Axle Ratio Refer To?

[OAvery]

Rear axle ratio is an important parameter of the engine, commonly known as the rear axle ratio, with its academic name being the final drive ratio. The rear axle ratio refers to the gear transmission ratio of the main reducer in the vehicle's drive axle. It equals the ratio of the rotational angular velocity of the driveshaft to that of the axle's half-shaft, and it is also equivalent to the ratio of their rotational speeds. Here is a partial introduction to the axle ratio: 1. The ratio of the vehicle's drive axle, also known as the ratio of the main reducer assembly, can be understood in depth as amplifying the torque transmitted from the driveshaft. Essentially, it determines how much force is needed to get the car moving. 2. A larger ratio results in greater output torque but slower output speed. To achieve higher power (torque) output for the vehicle, suitable for climbing or heavy loads, selecting a relatively larger final drive ratio (such as 6.83) can meet the demand, though it sacrifices speed. Conversely, a smaller ratio leads to smaller output torque but faster output speed. By choosing a relatively smaller final drive ratio (such as 3.89), the requirement for higher speed can be achieved.