How do I know which inner tube I need?
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In nearly all cases the tube size corresponds to the tyre size. The only thing to decide is
what type of valve (where you inflate the tyre) you require. This can be a straight rubber
stem valve or a bent metal valve (see pictures below).
If you are buying inner tubes for sports wheelchairs some of them use a high pressure valve called
'Presta' valve. (Picture below)
Once you have decided which valve type you require, you should be able to find it in
the relevant category.
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