SCHWALBE 20 Inch Butyl Bicycle Inner Tubes for 406 and 451 Wheels, AV6 SV6 SV7 AV7A SV7A SV7B with 40 mm Schrader or Presta Valve Bike Tire

SCHWALBE 20 Inch Inner Tubes

SCHWALBE butyl rubber inner tubes with 40 mm Schrader or Presta valves for compatible 20 inch tires. Choose the exact model, ETRTO size range and valve type. Options include AV6, SV6, SV7, AV7A, SV7A and SV7B; one inner tube per selected option.

Model and Fit Guide

Valve Types

AV models use a Schrader valve; SV models use a Presta valve. Every option in this listing has a 40 mm valve. Match the valve type and length to your rim and pump. The 406 and 451 wheel sizes use different bead-seat diameters, so choose using the ETRTO marking rather than the 20 inch name alone.

Material and Air Retention

The supplier identifies the tube material as butyl rubber. The detail panels show the tube, packaging and valve options. The supplier states that tubes are inflated and checked for leaks for 24 hours before dispatch, and describes the butyl construction as supporting air retention.

Contents and Weight

Each selected option supplies one inner tube. Net weight is approximately 200 g for each listed option. Multi-box and multiple-tube photographs illustrate the model range. Tire levers pictured in supplier promotional material are not included in the stated package contents. Match the tube to the tire size and check the tire and rim before installation.