Schwalbe AV7 Inner Tube 20X1 1/8-1 3/8 (500X28A)

Schwalbe AV7 20 x Tube, available with presta or schrader valve.The Butyl rubber compound prevents pressure loss and fewer occassions to inflate.SpecificationExtremely airtight!Extremely reliable! Quality control for safer cycling: Each tube is checked twi