Originally Posted by
rmp
20m because:
a) it's cheaper than 40
b) easier to get on the drum
c) allows some pulling at high fleet angles
d) less turns on the drum means you need less power
e) in the bush if you pull out all 40m it's a pain to put away properly. Easier to use 20m and straps. Imagine the situation....dark, driving rain, 40m of rope out on a muddy hill and you're trying to wind it back on right and it must be just right otherwise it won't fit. No thanks, with 20m you can get it on any which way and sort it out when you have time.
And carry extension straps/rope anyway if you need extra length.
If you must have 40m cut it and create an extension rope of it instead, it'll go around snatch blocks nicely enough. Works for me.