Schwalbe Schlauch Nr. 7XXL 20″ Inner Tube, Schrader Valve – E-Bike & Cargo-Bike Rated (3.5″–4.8″)

The Schwalbe Schlauch Nr. 7XXL is a heavy-duty 20″ inner tube designed specifically for e-bikes and cargo bikes running wide_attach tires. Built from high-quality butyl rubber, it delivers reliable air retention and durability under the higher loads, torque, and sustained use common to electric bikes.

This tube supports the following ISO / ETRTO sizes:

90-406, 100-406, 110-406, 120-406

Compatible tire sizes include:

20 × 3.50, 20 × 3.70, 20 × 3.80, 20 × 4.00, 20 × 4.25, 20 × 4.40

The Schrader (AV) valve with 40 mm length works with standard e-bike rims and pumps, making installation straightforward. Manufactured to Schwalbe’s strict quality standards with consistent wall thickness, this tube prioritizes reliability and longevity over weight savings — exactly what high-load e-bike applications demand.

Best for:

• Fat-tire e-bikes like Super73 and RAD 20”

• Cargo and utility e-bikes

• Compact 20″ e-bike platforms

• Riders prioritizing durability and dependability