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Puncture repair - step 3
Around the Academy:

Step 3

Small holes can be repaired by gluing a patch onto the tube.

Pump up the tyre to locate the hole and listen for the hiss of escaping air.

If this does not work take the tube out, pump it up a little and dunk it in a bowl of water or a nearby puddle.

A stream of bubbles will indicate where the puncture is.

Once you've spotted the puncture draw a circle round it with the yellow pencil found in most puncture repair kits.

Lightly roughen the area round the puncture with sandpaper.

When you are satisfied that the tube is clean, dry and free of dust get a patch.

Apply a thin, even coat of rubber solution and allow to dry.

Then press the patch into position.

Try to position the centre of the patch right on top of the puncture and smooth it out from there to avoid trapping any air.

Use the end of a tyre lever to press the patch down, especially round the edges.


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