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01-17-10, 07:34 AM
I had my first puncture last week! and I'm now trying to change the inner tube. I'm having problems with the inner tube sizing.
The original, punctured inner tube is a Specialized 700x20/28C,27x1-1(1\8) THIN.
I've just been down to a local supplier and brought back a 700x28C,27x1-(1/4) which did not look right as soon as I took it out of the box. Placing the tube inside the tire, it appears to be too big.
Can anybody please explain to me what these figures mean and what I need to look for when buying a new inner tube? Many thanks
The original, punctured inner tube is a Specialized 700x20/28C,27x1-1(1\8) THIN.
I've just been down to a local supplier and brought back a 700x28C,27x1-(1/4) which did not look right as soon as I took it out of the box. Placing the tube inside the tire, it appears to be too big.
Can anybody please explain to me what these figures mean and what I need to look for when buying a new inner tube? Many thanks