I thought a bunch of the triathlon specific bikes had 650 wheels on them...

I tried to buy tubes for my MTB that has 1.25 inch 26" tires on it- impossible from local shops. Had to order them.

I always carry two tubes (650) and patches for road bike. I'm glad my WSD Trek 2100 came with 650's, so I don't have to worry about my foot hitting the tire. I never even knew that was an issue with small frames!

I didn't use to believe in patches until that was my only option for the 1.25" tires. I patched it with some little stick-on patch, intending to change the tube out when I found new ones, but I didn't get around to it, and now I've put several hundred miles on it, and it's fine!

Nanci