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Self Sealing Dr Sludge 27.5"/650B Inner Tube Car Valve


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Dr Sludge Self Sealing 27.5"/650B Schrader Valve Inner Tube

  • Contains a sealant to prevent flat bicycle tyres
  • Seals punctures up to 3mm in length
  • Harmless sealant works time after time

Sizing Information

  • This size is most often used on XC/cross country, trail and all-mountain bikes
  • Car Valve (AKA Auto Valve or Schrader Valve)

These innertubes are compatible with the following ETRTO tire sizes:

27.5" x 1.75" = ETRTO 44-584
27.5" x 1.8" = ETRTO 47-584
27.5" x 1.95" = ETRTO 50-584
27.5" x 2.0" = ETRTO 52-584
27.5" x 2.1" = ETRTO 54-584

650x44b = ETRTO 44-584
650x47b = ETRTO 47-584
650x50b = ETRTO 50-584
650x52b = ETRTO 52-584
650x54b = ETRTO 54-584

Click to find out more about ETRTO tyre sizing and whether this is the right tube for your bike.


Dr. Sludge Inner Tubes and Puncture Prevention Products

Dr.Sludge are one of the most innovative bicycle puncture prevention companies. They are owned by the British company Weldtite and offer a great range of sealant filled inner tubes and puncture prevention strips.



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