Hey another question I have is what do the numbers mean on the tubes for bicycle tires? The ones I have on my bike now are fine, and when I went to the bike store they gave me Bontrager tubes which are 27 X 3\4 - 1 then on the next line it says 700 X 18c - 25c I have some clue that 700 is the tire size? cause i have 700 X 25 velotech rims but what do the other numbers mean, thanks again.
Cycling Equipment · Public discussion
Tube sizing
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- 19 October 2004
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- jjiam
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jjiam said:
Hey another question I have is what do the numbers mean on the tubes for bicycle tires? The ones I have on my bike now are fine, and when I went to the bike store they gave me Bontrager tubes which are 27 X 3\4 - 1 then on the next line it says 700 X 18c - 25c I have some clue that 700 is the tire size? cause i have 700 X 25 velotech rims but what do the other numbers mean, thanks again.
They mean that the tube will fit either a size 27" tire that is 3/4" to 1" wide or a 700 size tire that is 18mm to 25mm wide.
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