In reply to Luke90:
> Presumably they say 50m just to cover themselves with some leeway. (Or perhaps I just misremembered.)
Possibly, or they're just not sure, repeating what they've been told.
I bought an 80m rope and cut it in half: the best deal for my friend and me to get a 40m rope each. But I had to be sure it was long enough as I climb at AW a fair bit, so I checked it out first.