Minimum strength of depower line?

[Windigo1]

Good 3mm dyneema is rated to 2500 lbs or over 1100 kg, so it should be more than adequate, especially if it is inside of a piece of tubing that protects it from wear.

The issue is it goes through a metal tab or a plate inside the swivel under the cap on the CL and with a lot riding the rope being pulled hard onto the metal piece will wear down. You can see the wear. Eventually you only have a fraction of that left and it breaks. I should have taken a picture of the one I replace after failure.

I like a center line that has a tube protecting it.

Some hate that, and want a bare line.

If you opt for the bare line, you should go for around four times the strength, and not bitch about it when it skins the softer parts of your fingers.

.... Just my opinion, based on a bit of experience.

I remember that around 2005-6, Slingshot came out with some bars that were metal reinforced around the hole In the bar

Only problem was, the metal was super thin, and once it got worn to a certain point, it worked just like a knife...

After 15 years of kiting my fingers are doing fine that's never been an issue. Yes I go for 6mm normally plenty strong I never had one break.

[Foil]

Good 3mm dyneema is rated to 2500 lbs or over 1100 kg, so it should be more than adequate, especially if it is inside of a piece of tubing that protects it from wear.

The issue is it goes through a metal tab or a plate inside the swivel under the cap on the CL and with a lot riding the rope being pulled hard onto the metal piece will wear down. You can see the wear. Eventually you only have a fraction of that left and it breaks. I should have taken a picture of the one I replace after failure.

exactly!
I see this all the time as I service bars and replace snapped lines every week, would I use thin thin Dyneema for the power line? not a chance!
use spliced ends at all times if possible, knots may work but i have seen some god dam awful knots used by some guys,they are weaker, they slip, and are a line snag point, 5mm D12 Dyneema doubled is maybe the gold standard, no sheath and is used as standard by some well known bar makers, easy to replace, well by me it is, but can be a problem if your not very handy with the tools, I would not trust thinner line unless it was fully encased in thick factory process plastic, like the click bar thick rectangular item , no chance of getting sand in there unless its cut open.
Wear on these thick 5mm lines is gradual, eventually the surface starts ragging and looking shabby, once this is showing its better to replace as wear is rapid from this point as the rough surface just gets chewed up more and more, often hiding the extent of the damage, check it by wetting the line then digging in with your finger nails, pushing apart the broken fillants to just see what's left inside there, it can be shocking, leave it too long then bang its gone! too late,
it can take 3 years for this to happen but many guys can easily get through the power line inside a year, some take 10 years, depends how you look after the bar and how often you get out there, but the guys who like to get the most value from their lines seem to suffer the most snaps, a power line snap is the bad boy of snaps.