step down gear?

[WaxyChicken]

I often hear people refer to using the transmission so they have a "Step Down" gear.

I'm having trouble finding a clear definition of that term in Google. (perhaps an unofficial phrase?)

Which of these is an example of Step Down Gearing:

Motor RPM : Wheel RPM
-----------------------
2 : 1
1 : 2

Thanks in advance for the FYI.

[vinny1989]

Step down = Gearing down, so the wheels turn slower than the engine.

motor:wheel
2:1