Schwalbe AV7 20 x Tube, available with presta or schrader valve.

The Butyl rubber compound prevents pressure loss and fewer occassions to inflate.

• Extremely airtight!
• 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.
• This tube could come un-boxed.
• Presta or schrader valve