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12" / 12.5" Dr Sludge Self Sealing Inner Tube Car Valve

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Dr Sludge Self Sealing 12" / 12.5" Inner Tube for Kid's Bikes and Prams

    • 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 Prams, Pushchairs and Children's 12" bikes
    • Auto valve type (AKA Car Valve, Schrader Valve or American Valve).
    • Standard length valve suitable for almost all MTB rims up to a maximum 25mm.
    • Reinforced dual thickness tube/valve interface to prevent punctures.
    • Standard weight butyl rubber construction.

    These innertubes are compatible with the following ETRTO tire sizes:

    12" x 1.75" = ETRTO 44-203

    12" x 1.8" = ETRTO 47-203
    12" x 1.95" = ETRTO 50-203
    12" x 2.0" = ETRTO 52-203
    12" x 2.1" = ETRTO 54-203
    12" x 2.2" = ETRTO 56-203

    12 1/2" x all the sizes shown above

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





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