Not quite cycling


New Member
Jul 25, 2010
Hello All,

My question has nothing much to do with cycling but by far this felt like the best place to ask the question and get a reliable reply.

I need to replace the inner tubes on a pram but am unable to get precise information regarding the diameter of the tube I need from the instruction manual or from the tyre itself.

There are two common sizes of inner tubes for prams that are readily available 10" x 1.75" and 12.5" x 2.25". I have measured the wheel rims and the tyres on the pram in question

Wheel rim diameter - just over 10"
Tyre diameter - 12.5"

I would be most grateful if someone could tell me which of these two diameters I should use when ordering new inner tubes. I can get them for very little cost on the net or go to the manufacturer of the pram and get fleeced.

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