Amazon has Schwinn Replacement Hybrid Bike Tire (700c x 38mm) on sale for $5.62. Shipping is free with Prime or orders $35+.

About this Item:

• Designed to be compatible with a 28″ diameter internal rim by 1 1/2 inches, with widths ranging from 17mm to 23mm
• 700c x 38mm hybrid bike tire for riding on pavement and light trails
• All-weather tread design with a smooth center to reduce rolling resistance and deep outer grooves for wet traction
• Puncture guard provides extra layer of resistance under tread to help prevent flats.
• Durable steel bead construction, with a recommended PSI range of 50 to 75