25mm tube in 28mm tyre yes/no ?

[Sunny Portrush]

I have the same problem with condoms!

I pity your wife if you use 23mm condoms - not even an inch there

 

[nickyboy]

An interesting question would be what is the widest tyre you could safely use a 25mm tube in?

Wonder what would happen if you put one in a fat MTB tyre for example

 

[Dogtrousers]

An interesting question would be what is the widest tyre you could safely use a 25mm tube in?

Wonder what would happen if you put one in a fat MTB tyre for example

I reckon as a get-you-home measure it would probably work.

I once stopped to help an MTB rider with a puncture. I offered him a 25 or maybe 28mm tube and he politely declined. In the end I gave him a packet of instant patches and continued on my way. I suspected he had already phoned for help and only took them to be polite.