Schwalbe SV19F - 29 x 2.10"- 3.00" with 48mm Presta Valve Schwalbe SV19F - 700c x 38mm with 48mm Presta Valve 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..
Best Price: £8.50 from Merlin Cycles