Schwalbe Inner Tube 7A for 20"

Inner tube for 20" tyres.

Specifications:

Application:

BMX, Trial, Foldable/Collapsible Bikes, Recumbent Bikes

ETRTO:

37-438 to 37-451

Tyre Dimensions:

20 x 1 3/8"

Inner Tube Material:

butyl

Valve Type:

AV / Schrader 40 mm, DV / Dunlop 32 mm, SV / Presta 40 mm

Dimensions (ETRTO):

• 20 x 1 3/8 (37-438)
• 500 x 28A (28-440)
• 500 x 35A (37-440)
• 20 x 1 1/8 (28-451)
• 20 x 1 3/8 (37-451)

Models:

28/37-438/451 AV / Schrader 40 mm

Valve Type:

AV (Auto / Schrader valve)

Valve Length:

40 mm

Type:

AV7A

Manufacturer Number:

10416310

28/37-438/451 Dunlop 32 mm

Valve Type:

DV (Dunlop Valve)

Valve Length:

32 mm

Type:

DV7A

Manufacturer Number:

10416311

28/37-438/451 SV / Presta 40 mm

Valve Type:

SV (Sclaverand/Presta)

Valve Length:

40 mm

Type:

SV7A

Manufacturer Number:

10416313

Valve Information

Tubes are available with various valve types.
Choosing a valve is dependent on application and the rim's valve hole diameter.

AV / Schrader Valve:

• Synonyms: Auto Valve (AV), Schrader Valve
• Outer Diameter: 8.5 mm

DV / Dunlop Valve:

• Synonyms: Blitz Valve, Normal Valve (NV)
• Outer Diameter: 8.5 mm

SV / Presta Valve:

• Synonyms: Sclaverand Valve (SV), French Valve, Presta Valve
• Outer Diameter: 6.5 mm
• Other: all Schwalbe tubes with a Presta valve can be unscrewed. (To lengthen the valve, add anti-flat agents, etc.)

Technology:

Inflation Pressure Stability
A Schwalbe inner tube maintains the air much longer. The quality of the inner tube is already determined by its raw materials, through the ingredients and the purity of the rubber compound. During vulcanisation, each Schwalbe inner tube is placed in a mould and is then inflated. This is the only way to ensure a uniform wall thickness and excellent air retention.

Reliability
Rigorous monitoring that ensures the best operational reliability: each inner tube is inflated in the fabric and stored under pressure for 24 hours to check the air retention ability.

Tube Groups System
Due to its high elasticity and quality, a single inner tube covers a large number of tyre sizes. For example, inner tube no. 17 works just as well for 28 mm wide tyres as for 47 mm wide tyres. Only an extremely high-quality and reliable inner tube can meet this requirement.

Contents:

• 1 x Schwalbe 7A inner tube