27 x 1 1/4 tube in a 27 a 1 3/8 tire?

[ET16]

I think I have a flat. I have an old 27 x 1 1/4 on hand. Can I use it, or is getting the right size better?

 

[andyd]

This is a joke right? I haven't ridden a bike in decades and I know the answer. YES!

 

[benhen77]

Yep. The rule with tubes is to go a size smaller, not a size larger.

 

[NYEngineer]

It'll be fine.

I haven't put a tube in a bicycle tire for almost ten years.