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Dr Sludge Self Sealing Bicycle / Pram Inner Tube 12" 1.75" to 2.125" Schrader Valve

This 12" tube is loaded with a specially formulated compound, that forms a layer of sealant around the inside of the tube protecting it from punctures. This size is suitable for BMX & mountain bikes with 20" wheels. Weighing only 70 grams more than a standard inner tube, it wont slow you down.


  • Self Sealing tube Prevents flat tyres
  • 12" childrens bikes, pram and buggy wheels from 1.75" up to 2.125" width
  • Seals punctures instantly up to 3mm diameter
  • Inner tube and tyre will not stick together
  • Shcrader (car type) valve
  • Weight only 265 grams

Useful Tips

  • Always remember to check your tyre for objects such as glass or thorns when fitting.
  • Ensure the wheel is rotated several times prior to use to allow Goo to evenly coat the tube.