Related Clues:

• Bike power sources
• Organ appendages
• PRNDL picks
• Mechanisms not meant to be handled
• Foot-rests or drivers on a bicycle
• Just for a change, one may have them in the car
• They're downtrodden
• You get them into a car for a change
• How one pleads to put one's foot down over them
• Put a stamp on them
• They're all underfoot
• They work in shifts
• Toothed wheels
• Stick shift selections
• They often get depressed