What does “gear ratio” indicate in a manual transmission?

The concept of "gear ratio" in a manual transmission is crucial for understanding how power is transmitted from the engine to the wheels. It specifically refers to the relationship between the number of teeth on two gears, particularly the driving gear and the driven gear in the transmission system.

In a manual transmission, gears work together to convert engine speed into usable torque and speed for the vehicle. A gear with a higher number of teeth driving a gear with fewer teeth will result in a lower gear ratio, which means more torque is available for acceleration but less top speed. Conversely, a lower tooth count on the driving gear compared to the driven gear leads to a higher gear ratio, allowing for higher speeds but less torque. Thus, understanding gear ratios is key to optimizing performance based on driving conditions and needs.

The other options do not accurately describe what gear ratio signifies in this context. The weight of the vehicle and the relationship between tire sizes do not directly relate to how torque and speed are managed through the gears. Similarly, while the distance a vehicle travels in each gear can be influenced by gear ratios, this distance is not what the term "gear ratio" specifically indicates. Therefore, the correct understanding encompasses the teeth relationship, forming the basis of how manual transmissions operate