Slang term for anyone passionate about the mechanics of motors and anything motorized. Usually likes to share lots of details that a non-gearhead will be bored by.

device that reduces motor speed and increases motor torque.

A gearmotor part that holds the gearing, which converts the basic motor speed to the rated output speed.

a car enthusiast

Gearhead is the name of a DC Comics supervillain.

What you will be after your Montana mountain-biking experience.

Someone with a technical background.