Bicycle Ridden by Two People
Puzzle 6 of Things to be Grateful For Hard Pack
Question is: Bicycle Ridden by Two People
and the answer is: TANDEM
Word Meaning:
TANDEM — (countable) A carriage pulled by two or more draught animals (generally draught horses) harnessed one behind the other, both providing pulling power but only the animal in front being able to steer.
Definitions from Wiktionary.