Canker Posted: Man people are such wimps. Tubes stretch easy and worst case is nothing. It really doesn't matter if you are running a stretched tube or a 29er if you run over something and it pokes a hole in the tube you have a hole in the tube and the air escapes. It would different if we were talking about running a 23mm road tube in a 2.8in tire but this is a minor stretch.
I don't like flats from defective over stretched tubes. I intentionally purchase the largest width and correct diameter tubes that are available and will fit in my tires.