Originally Posted by
ThermionicScott
Even more evidence that it's probably not ISO.
You'll want to get a better measure before ordering the new one. Maybe tape it down to a piece of cardboard, and use an upended ruler on each end to make a good mark on the cardboard, and measure between those.
Last I checked, you can get Shimano cartridge bottom brackets in 122mm and 127mm, so it's probably one of those.
looking at the article that SquidPuppet had left. i could probably say that it is not ISO. i recall the crank arm having a thread with a plastic casing. it also appeared to look alot like the crank arm in the article.