The Schwalbe 16-18 Presta Valve 40mm Inner Tube featured here at Escapa is a butyl bicycle inner tube designed for various 16- and 18-inch tires. Its high elasticity allows it to fit several ETRTO sizes, making it a versatile replacement for folding bikes, children’s bikes, and other models with small-diameter wheels.
Its uniform construction provides good pressure retention and reliable performance during everyday use. It features a 40 mm Presta valve, suitable for rims compatible with thin valves.
Schwalbe Standard Inner Tube
The Schwalbe Standard line is designed to offer reliability, elasticity, and durability on all types of bicycles. The purity of the butyl compound and the uniform wall thickness help maintain air pressure longer and reduce the need for constant pressure adjustments.
Each tube is inflated for 24 hours at the factory to test its airtightness before it reaches the market. This process helps detect potential leaks and ensures consistent performance.
Compatible with various tire sizes
The elasticity of butyl allows a single tube to adapt to different tire diameters and widths. The Schwalbe SV4 is compatible with the following ETRTO sizes:
- 37-340
- 28-349 to 37-349
- 28-355 to 35-355
Depending on the rim and tire, these dimensions correspond to certain bicycles with 16- or 18-inch wheels. To confirm compatibility, always use the ETRTO code printed on the sidewall of the tire, as the size expressed in inches can be ambiguous.
40 mm Presta Valve
The tube features a 40 mm Presta valve, also known as an SV or Sclaverand valve. This type of valve has a narrower diameter than a Schrader or automotive valve and is commonly used on rims with a small valve hole.
Before purchasing, be sure to check:
- That the rim is compatible with a Presta valve.
- That the 40 mm length is sufficient for the rim profile.
- That the tire falls within the specified ETRTO range.
- That the rim bed is in good condition.
Made of butyl
Butyl provides a good combination of elasticity, durability, and pressure retention. Its adaptability allows the tube to be used in different widths without compromising the fit, provided the specified measurements are followed.
Weighing approximately 85 grams, it offers a durable and functional solution for the daily maintenance of small-wheel bicycles.
Recyclable inner tube
Schwalbe butyl inner tubes are fully recyclable. The brand states that each new inner tube contains approximately 20% material from recycled used inner tubes.
