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  1. Hi friend. Not a silly question. 622x19c number is your wheel size. You need to look at the tire itself to determine what size tube you need. It’ll probably say something like “700×1.9/2.3 (inches) OR 700×32 (mm). Buy a corresponding tube.

  2. Stock-Side-6767 on

    622 ISO/ETRTO, 700c, 28″ (mostly, and 29″ are all the same rim diameter.

    This is why I like the ETRTO standard.

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