Maxxis Flyweight inner tube with Presta valve, 700 x 18/25C. Just as a flyweight boxer is the lightest of the traditional boxing classes, flyweight tubes are the thinnest and lightest tubes in the Maxxis range, light and nimble, designed for those who want to reduce the rolling weight of their wheels.

• Lightweight butyl tube for road bike and cross-country
• For 28 inch, tire width 18–25 mm (ETRTO 18/25-622)
• SV (Presta) valve, 60 mm length, RVC
• Wall thickness only 0.45 mm
• Weight 52 g