Schwalbe 20″ Inner Tube Presta Valve (20×1 1/8-20×1 3/8) SV 7A

Schwalbe 20" Inner Tube SV 7A / AV 7A for (451) Lightweight and strong! Schwalbe inner tubes are designed & manufactured to retain air pressure considerably longer than their competitors. Not only is each individual tube inflated & inserted into a mould to ensure that there is even wall thickness & excellent air retention, they are also stored under pressure for 24hrs to test air retention.

SV 7A : 20×1 1/8 to 1 3/8 (28-451 to 37-451), Presta 40mm

AV 7A : 20×1 1/8 to 1 3/8 (28-451 to 37-451), Schrader 40mm