1x 26" x 1 /3/8 Bicycle Inner Tube-Schrader Valve Roadster Bike Cycle

• Durability

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Size: “ 26 \times 1\ 3/8 inches (Note: This is a specific fractional size, distinct from decimal 26" mountain bike tires).

• ETRTO Size: 37-590 (The precise metric measurement of the tire's internal diameter).

• Valve Type: Schrader (Car Type) – The wider, robust valve often found on cars and mountain bikes.

• Material: High-quality butyl rubber for consistent air pressure retention.

• Durability

Designed for the upright "Roadster" style of riding, these tubes are typically thicker than racing tubes to provide better resistance against pinch flats and punctures during daily commutes or leisure rides.

• Reliable Valve Stem

The Schrader valve features a spring-loaded internal pin, making it incredibly easy to inflate at any local petrol station or with a standard floor pump without needing specialized adapters.

• Optimized Fit

The "fractional" 26" sizing is tailored for narrower rims. Unlike the 26" wheels found on mountain bikes (which use a 559mm rim), this tube is designed for the 590mm rim diameter , ensuring a snug fit without bunching or stretching thin.