There is no complex science behind what straight-cut gears are. It's exactly as it sounds, gears with teeth that run straight out from the center of the wheel, rather than slanting in a spiral. The ...
来自MSN

Car gears - explained

How do gears work? Why is it that the first gear gives you the most torque and hence the most acceleration? Since the first gear gives me the most acceleration why do I need to switch gears? Wouldn't ...