Meaning: He rode a vehicle with two wheels and pedals at a high speed.
Choice of Words: The bike is a vehicle with two wheels, pedals, and a seat. Fast means moving quickly.
Alternative Expressions
The boy sped along on his bike.
Meaning: This sentence describes a boy riding his bicycle at a fast pace.
Choice of Words: The verb "sped" means to move quickly, and "along" indicates that the boy was riding in a particular direction. "On his bike" specifies the object that the boy was riding.
He zipped past on his speedy bike.
Meaning: This sentence describes someone riding a very fast bicycle and passing by the speaker.
Choice of Words: The verb "zipped" suggests a quick and effortless movement, and "past" indicates that the boy rode by the speaker. "Speedy" emphasizes the fast speed of the bike.