About 4" and I am running 5/8 Sta-Set polyester braid with a spun filament core in it with no issues.
I reccomend you never run or pull with nylon rope/line as it stretchs a full 20% at working load and a line break can be fatal to you or anyone close by. The line I use only stretches about 2-3% and there is no killer whiplash should it break.





