A tire is called soft when it doesn’t have sufficient air pressure to meet the vehicle manufacturer’s recommended psi (pressure per square inch). Soft tires lead to flats and tire blowouts.
Add air to your tire until it reaches the proper air pressure (psi, as measured by an air pressure gauge). To find the proper air pressure, consult your vehicle’s owner’s manual or find your recommended psi on the sticker on your door jam. (Here’s how.) If your tire continues to lose pressure, visit your local authorized Michelin tire dealer.