On a bike, you can easily overtake cars stuck in Paris traffic.
The best way to access a cheap bike in Paris is through the Vélib' rental system—it's incredibly affordable and straightforward.
Paris launched its self-service bike program years ago, and it's now expanded to cities like Lyon (Vélov'), Bordeaux, Nancy, Strasbourg, and beyond in Europe. Just be 14 or older and provide a €150 security deposit (not charged) to get started.
Pick up a bike from any station and return it to another. Stations are every 300 meters in Paris, making it perfect for solo rides or family outings with kids.
Update: Vélib' now covers Paris's inner suburbs, so you can grab bikes in nearby towns too. All for less than €30 per year! Head to the Vélib' website to subscribe and start pedaling economically.

Skip buying a bike—renting via Vélib' is smarter. Choose annual (€29), weekly (€5), or daily (€1) subscriptions. That's under 8 cents a day for a year pass!
Plus, the first 30 minutes of every ride are free. Compare that to car fuel costs, and the savings are massive, even for the most efficient vehicles.