Inner Tubes
- Thread starter Jo25
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Alien8
Senior Moment
You buy the tube to fit the tyre so a tube marked as 700 x 28/38c will be okay for a tyre between 700x28c and 700x38c.
Of course in reality it is still okay to use a tube in a tyre which is a bit outside of its rated size but there's no real reason to go too far.
So, yes, using 700 x 28/38c to replace a 700 x 28/37c will likely be fine.
If you want to know about what tyre sizing marks actually mean you could start here.
Of course in reality it is still okay to use a tube in a tyre which is a bit outside of its rated size but there's no real reason to go too far.
So, yes, using 700 x 28/38c to replace a 700 x 28/37c will likely be fine.
If you want to know about what tyre sizing marks actually mean you could start here.
e-rider
Banned member
a tube is made to fit a range of tyre sizes
the 700 number is the wheel size - this doesn't change as your wheels are a fixed size - most road bikes use 700 wheels
the 28/38 is the range of tyre widths that the tube will fit in mm.
so any tyre from 28mm wide to 38mm wide.
is your tyre in that range?
if you replace a 700 x 28/38 with a 700 x 28/37 then only if you had a 700x38mm tyre would you have a problem - and even then it would actually be OK anyway as the numbers are only guidelines and 1mm won't make a difference.
the 700 number is the wheel size - this doesn't change as your wheels are a fixed size - most road bikes use 700 wheels
the 28/38 is the range of tyre widths that the tube will fit in mm.
so any tyre from 28mm wide to 38mm wide.
is your tyre in that range?
if you replace a 700 x 28/38 with a 700 x 28/37 then only if you had a 700x38mm tyre would you have a problem - and even then it would actually be OK anyway as the numbers are only guidelines and 1mm won't make a difference.