If your going for ALMAX IV Series, the 1.0 metre long version doesn't go very far at all!!
Once you loop it you'll realise that there is much room!
I know, I bought a metre - going by the length of my old chain. When it arrived there was probably just enough space to put the back wheel and maybe my hand through the loop!
Oh, and don't even think about putting it under the seat when you ride - it won't fit!!
Hope this helps a little...
