![Schwalbe Inner Tube SV12B 26 x 3/4" - 1.00" / 650 x 20 / 25A Presta Tube](http://senacrecycles.co.uk/cdn/shop/products/p5c7029c2ed2e93.72509198_0c97760e-204c-4d80-85ff-5ebb72bb8142.jpg?v=1705159387&width=1445)
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