Schwalbe SV12B 26 x 3/4" - 1.00" / 650 x 20 / 25A Presta Tube

Extremely airtight! The Butyl rubber compound prevents pressure loss and fewer occassions to inflate. Extremely reliable! Quality control for safer cycling: Each tube is checked twice at the factory to ensure safer cycling. Having the correct pressure means fewer punctures and reduced rolling resistance