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Code: 4813
Schwalbe SV21/AV21 - 27.5 x 1.50 - 2.40" (650B) Schrader or Presta Inner Tube

 

Extremely airtight! The Butyl rubber compound prevents pressure loss and fewer occasions 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

Very good quality inner tubes. come with better dust caps than other brands I have bought. Paired with the Schwalbe marathon plus MTB tyres on my E bike hope to reduce the risk of punctures. Like the fact these are designed to be less porous and so retain air for longer.
Great quality as always from Schwalbe.