Inner tube question

[Dr Imran T]

Hello chaps.

A relatively straight forward question I hope. I have bought a set of 28c tyres for my bike which at the moment has 35c tyres fitted. I understand that inner tubes fit within a range but I am unsure whether my 35c inner tubes will fit the new slimmer 28c tyres.

So, do I need a new set of inner tubes or are the ones I have at present OK?

Thanks

[anonymous-user]

depends most 700c tubes that cover thinner road tires will fit up to 25c or 28c and those that fit wider road bias hybrid tires will do 25c/28c-38c. If you have the later type tubes then you'll be ok, if not you'll need new ones.

[neilski]

It should (though not always) be marked on the tube somewhere what the recommended range of widths are e.g. 700 x 18-25 or 28-35 etc. It may also be marked as 25/35-622 where the smaller numbers refer to the width. As long as you keep within the recommended range you should be fine, and you're best avoiding putting a fat touring tube into a skinny racing tyre and vice versa.

[Dr Imran T]

That sounds plausible. I do have a hybrid with 35c tyres as standard so I would hazard a guess that my inner tubes are in the range of 28-38c.

[Dr Imran T]

neilski said:

It should (though not always) be marked on the tube somewhere what the recommended range of widths are e.g. 700 x 18-25 or 28-35 etc. It may also be marked as 25/35-622 where the smaller numbers refer to the width. As long as you keep within the recommended range you should be fine, and you're best avoiding putting a fat touring tube into a skinny racing tyre and vice versa.

Great, thanks.