Interchanging inner tubes

[User]

 

[fossyant]

700 wheel size, 23/28 is the width of the tyre.

Tubes are usually 20/23 and 25/28 - so see what it says on your tubes before shoving a 20/23mm in a 28 mm tyre - it will work, but you'll be overstretching the rubber - therefore more likely to go bang...

A 28mm will go in a 23mm just, but you might just pinch the tube..

 

[Perry]

A report today said that Science and Maths exams are harder then arty-farty ones.

As a Literature graduate therefore (!) not only am I in the less intelligent half of the population but am also technically, numerically and common-sense wise illiterate.

So though I can recite the whole of Othello by heart, know how Keats died and know how to choose a good book to read to the kids I don't understand tyre sizes.

I have tried to help myself - I've visted Sheldon Brown's site, the CTC site and posts here.

But I have only 2 questions which I need an answer to.

Please.

I have two bikes - one is a wheel size 700x23 (langster), the other a 700x28 (sirrus).

Does the 700 refer to the diameter? What does the other number refer to?

Secondly, can I interchange the inner tubes on these?

Great post!

 

[hubgearfreak]

700 wheel size, 23/28 is the width of the tyre..

622 wheel size, with the outer diameter of the tyre being in the range 660 - 700ish