Every 3° (5°F) increase in temperature would increase the tire pressure by about 1%. If you inflate the tires in a cool garage in the morning (18°C / 65°F) and ride later at higher ambient temperatures (35°C / 95°F), it may result in an increase in inner tube pressure (e.g. 0.5 bar/8 PSI). Especially when riding on high temperature black asphalt pavement with temperature exceeding 65°C (150°F), the tire pressure may easily exceed the allowable maximum value. In addition, too high tire pressure can cause the tire to break from the rim during cycling, which can result in the risk of injury. If pneumatic tires are stored at 60°C (140°F) or higher (e.g. in a car in hot weather), deflate the inner tube to 1 bar/15 PSI to avoid valve deformation. Product name: Ultra-light road bicycle inner tube Features: Small size, light weight, good toughness, cost-effective Size: 700 x 18 23 25 28 30 32C Recommended scope of application Valve length French 65mm Material: TPU colour: orange Package Contents: 4 x Super Light Bicycle Inner Tube Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Road Bike TPU Tire 700X18-32c Road Bike Gravel Inner Tube