Tube size problem.
 

I have a 700x18/23 tube to put in a 700x25 tire, would you take the chance? I'm 30.5 kms from home with nothing else on hand.

Thanks

No problem. I have used them in 700 X 28 tires.
Tubes expand to fit the tire size.

Unless it's a really cheapo tube, it shouldn't be a problem.

^^thanks! that's what I was thinking but never did it in the past, I was sure that some of you guys had done it before. once again, many thanks

Ran 18/23 tubes in 28s on my commuter for over a year.

close enough that even a Walmart/Bell tube will get you home.....

your better off using a smaller tube rather than a larger tube... Large would more likely result in a pinch flat or the excess tube getting stuck between the rim and the bead of the tire