How do I fix a flat tire? July 11, 2022 20:41 Updated Experiencing a flat tire when you are out on a ride is scary, but once you know how to fix it, you'll be ready to ride — even if your ride is interrupted. Check out step by step instructions here. Related articles Can I buy replacement service parts from you? What's covered under my Schwinn warranty? How do I get a warranty replacement? How can I contact Schwinn? Where can I get my bike serviced?