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Which Inner tube for 27 x 1 1/4 tire?

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Which Inner tube for 27 x 1 1/4 tire?

Old 07-05-13, 06:52 PM
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bike_n00b
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Which Inner tube for 27 x 1 1/4 tire?

Hello all

I'm looking to buy a new inner tube online and was just posting to confirm which one I need to buy, just a little confused by all the sizes.

As the title reads, it will be for a 27 1 1/4 wheel, and on the side of the current wheel it says 32-630. I have an 80s Raleigh Milk Race.

Through a bit of research I've gathered that a Schwalbe 700 x 28-47c Schrader could do the job. Is this ok?

I'm basing it on the numbers I mentioned earlier - 32-630, is it true this 32 is 32c which is in between 28 and 47c? Or am I just confused.
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Old 07-05-13, 06:59 PM
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That will work.
Chances are the box may say for 700c AND 27".
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Old 07-05-13, 06:59 PM
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Jeff Wills
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No, that tube will fit your 27 x 1 1/4" tire. You've got a pretty good grasp of bicycle tire sizes, and tubes are stretchy. They fit lots of different tires sizes.
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Old 07-05-13, 07:05 PM
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Multiply tire width in nches by 25.4 to get the metric. Then any tube that shows a range that encompasses that figure is fine. So 1 1/4 = 32mm (c) so 28-47, 19-32, 32-40 all are OK. Even a smaller one (19-23) will work but will be thin when inflated. 622 is fine for 27 inch.
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Old 07-05-13, 07:11 PM
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Ok I get it now. Thanks a lot for all of your help
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Old 07-06-13, 05:08 AM
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Hi,

The C in 700C or 700 x XXC indicates a 622mm rim and XX is
the tyre width. Tubes for 622mm will fit your 630mm rims easily.

rgds, sreten.
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