There is a lot of cheap crap out there.
Personally, I have never cared for the plastic stuff and I have used rope as big as 1 1/4″ before as part of my job at several points in my life.
I have also seen that same 1 1/4″ rope break under load before.
I have seen 1 1/4″ Nylon rope stretch, start smoking and basically melt in half before also while towing a huge Dredge up the Columbia river against an outgoing tide. It gets hot from stretching and the strands rubbing on each other under an immense strain.
Once it starts smoking it’s pretty much a done deal if you don’t take the load off immediately.
It ain’t pretty. It’s like a giant rubber band and you don’t want to be behind either end of it when it goes. Luckily the tug boat I was on had a metal cab. The rope snapped and came straight back to the cleat behind the cab as I was standing in the doorway watching it.
Three feet from the cleat.
It came shooting straight back and slammed up against the back wall and all at once there was 150 feet of inch and a quarter rope on the deck that wasn’t there three seconds earlier.
I just barely reacted fast enough to duck behind the metal wall.
I also had to cut another one because the strain was literally trying to pull the huge cleat off of the metal deck.
I reached out very carefully with a brand new Old Timer 4 inch folding knife and just barely had to push the edge on the rope.
It actually exploded.
An inch and a half thick Manila tow rope that had 200 feet of 30 inch pipeline on floats tied to the side of a dredge.
The same scenario, towing the Dredge up the Columbia against an outgoing tide.
You can’t imagine that kind of load.
It knocked me backwards onto my ass, twisted the blade sideways in the knife and there were little fluffy pieces of rope like Dandelion heads floating in the air ten feet around me.
I was young and dumb boy but I’ll never forget that one.
Do your homework and get good rope.
Your life just might depend on it sometime.