Old 09-09-09, 01:07 PM
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Oh- you're in Switzerland! That changes a lot. Before buying a new tire, measure the diameter of your rim- It may be a 622 after all- I didn't think that 630's were ever very common in Europe. Remember that the 622 or 630 diameter is the bead seat diameter, so the rim diameter will be a little more.

The inner tube should fit either diameter.
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