Inner tube size.

[ethan5]

Hello,
I've got 700 x 25mm road tyres and I'm going to 23mm., will my inner tubes be ok for the smaller tyres? Thanks.

 

[tyred]

Yes. Inner tube size isn't an exact science.

 

[jig-sore]

inner tubes will be marked up with the range that they cover so if you take it out and have a look then it will tell you.

the ranges do vary a lot so its impossible for anyone to give you a definite answer without knowing what you have.

usual sizes are 700 x 18-23 and 700 x 25-32 but you may have a size that covers both 23 and 25.

as for using the "wrong size", well im not really qualified to comment

 

[Paulus]

If you buy specialized tubes, one tube does 20-28. Seems to fit most sizes.