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PE, Breaking Strain and Diameter!

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Post Options Post Options   Likes (0) Likes(0)   Quote SufixRockMan Quote  Post ReplyReply Direct Link To This Post Topic: PE, Breaking Strain and Diameter!
    Posted: 19 Feb 2020 at 8:58am
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Alright, question time.

The PE system is quite old now, and originally related to diameter, right? And the old rule of thumb was PE # x 10 would roughly equal breaking strain?

But with the incremental improvements over time could you now fish 'modern' (like Shimano Ocea X8) PE6 which has a far higher breaking strain than an older PE8. The bonus is that you can spool up more for the same sized reel. Excluding abrasion resistance what am I missing here?

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Post Options Post Options   Likes (0) Likes(0)   Quote coroben Quote  Post ReplyReply Direct Link To This Post Posted: 19 Feb 2020 at 9:33am
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PE I believe is thickness, not diameter
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If the line is round, what is the difference between diameter and thickness?
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Post Options Post Options   Likes (0) Likes(0)   Quote coroben Quote  Post ReplyReply Direct Link To This Post Posted: 19 Feb 2020 at 10:08am
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its the way its measured. note im not entirely sure
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Post Options Post Options   Likes (0) Likes(0)   Quote SufixRockMan Quote  Post ReplyReply Direct Link To This Post Posted: 19 Feb 2020 at 10:59am
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it doesn't really matter in the context of my question?
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Post Options Post Options   Likes (0) Likes(0)   Quote Muppet Quote  Post ReplyReply Direct Link To This Post Posted: 19 Feb 2020 at 6:31pm
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Gosen is very thin and very close to stated breaking strains.
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Originally posted by SufixRockMan SufixRockMan wrote:

Alright, question time.

The PE system is quite old now, and originally related to diameter, right? And the old rule of thumb was PE # x 10 would roughly equal breaking strain?

But with the incremental improvements over time could you now fish 'modern' (like Shimano Ocea X8) PE6 which has a far higher breaking strain than an older PE8. The bonus is that you can spool up more for the same sized reel. Excluding abrasion resistance what am I missing here?


It's certainly an interesting and confusing topic when you're trying to learn about fishing techniques that use braided lines.

Most of the Japanese braids don't have the diameter on the spool or packaging, but they have the PE rating, and the 'maximum' breaking strain, and/or an 'average' breaking strain.

A lot of people still talk about "I loaded it with 30lb braid" etc. But in many cases, 30lb stated is nothing like the actual (except with the likes of Gosen, apparently). 

I've got a few reels with Tasline Elite White on them, and that company publishes a table with the PE rating, the diameter, and the max and average breaking strain. That makes life easier if you're trying to load line which correlates to the rod rating etc.

Ultimately, I don't think I've lost many fish through the braid snapping due to the breaking strain being exceeded - even with lighter lines for softbaiting. With the reel drag set to a realistic level, I'm never going to approach the breaking point in a straight pull, i reckon. A 'bust off' for me is usually because the fish has run the line against rock. Usually, the hook just pulls, probably never hooked properly in the first place or I give it slack line by my own error. 

However, i'm not jigging for kingies when i'm sure the realities of breaking strain and the general balance of line with rods' PE ratings and reels' drag capability is more acute.


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I saw one bad spool of Gosen once. We tested three random spools at Gofish compared to the customer whose was breaking really easy.
The others broke but took a fair bit more effort and was about breaking strain. The real light stuff is super thin and breaks by hand.

I have one spool that is four years old now turned it around last season no worries still going strong.
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Post Options Post Options   Likes (0) Likes(0)   Quote Rozboon Quote  Post ReplyReply Direct Link To This Post Posted: 19 Feb 2020 at 10:43pm
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Per my thread a little while back, the new Shimano Ocea 8 (note, this is newer than the EX8 stuff) is ridiculously thin for the breaking strain. PE2 is 45lb, PE3 63lb, PE4 76lb, PE8 151lb (!!!!)

Makes rod matching etc a little tricky when the rods only have a PE rating. For example, I recently bought a PE3-6 jig rod, spooled the reel with PE4 Ocea, which has a breaking strain very close to that traditionally associated with PE8 (80lb). I think if I maxed out the capabilities of the reel and line, the rod might come out worse for wear.

This becomes doubly tricky in light line classes. I have a PE2-3 slow jig rod; the reel on it is spooled with PE2 and if I get snagged I have a really tricky time breaking it off, the rod and reel just don't have the beans to break 45lb, you have to be extremely quick to point the rod at the snag and so help you if the boat drifts over your line in the interim.
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Post Options Post Options   Likes (0) Likes(0)   Quote kaveman Quote  Post ReplyReply Direct Link To This Post Posted: 20 Feb 2020 at 7:39am
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The actual breaking strain of most braids are what they would be when a knot is tied in them, eg back to back uni 66% knot strength, so 20lb braid would normally break around 30lb less 1/3 loss for knot weakness = 20lb
PE rating is not x 10 eg pe 2 =30lb, pe3,= 45lb, pe6 is 80lb and pe10 is 110lb
Most companies bull**** and overstate there own products too. There was an expert in Australia who tested every braid made and he was the undoubted world leading tester of braid thickness and breaing strain, his findings were often way different to the stated bs and thicknesses on packaging
www.kavemantackle.co.nz
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Post Options Post Options   Likes (1) Likes(1)   Quote The Tamure Kid Quote  Post ReplyReply Direct Link To This Post Posted: 20 Feb 2020 at 11:22am
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That's why I buy Tasline off you, Kaveman, when I need to re-spool. I know what I'm getting as they are very transparent about the lines' specs, and I find it superb to cast with etc as well.
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Post Options Post Options   Likes (1) Likes(1)   Quote Starnsy Quote  Post ReplyReply Direct Link To This Post Posted: 20 Feb 2020 at 7:29pm
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The standard thickness of PE yarn uses denier (d) notation of unit. This standard is for 100% PE yarn and includes total denier including coatings and pigments. d (denier) is the mass per 9000 m in length expressed in grams.


The standard values ​​for PE yarn thickness are as below:

PE1 - 200d

PE2 - 400d

PE3 - 600d

PE4 - 800d

PE5 - 1000d

PE6 - 1200d

PE8 - 1600d

PE10 - 2000d

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Post Options Post Options   Likes (0) Likes(0)   Quote Espresso Quote  Post ReplyReply Direct Link To This Post Posted: 20 Feb 2020 at 8:56pm
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PE is the diameter measurement used for silk thread manufacture.
PE stated by many manufacturers is incorrectly used and unfortunately misleading (whether intentional or not) particularly when trying to actually get a matched rod, reel line weights.

I have personally line tested many braids, the results have been, eye opening.
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Post Options Post Options   Likes (0) Likes(0)   Quote coroben Quote  Post ReplyReply Direct Link To This Post Posted: 21 Feb 2020 at 8:27am
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post em up
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Post Options Post Options   Likes (1) Likes(1)   Quote Titahi Quote  Post ReplyReply Direct Link To This Post Posted: 21 Feb 2020 at 3:54pm
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here is a link to the archived paulus braid testing site...

"I love standing by the ocean and just knowing what its for"
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Post Options Post Options   Likes (0) Likes(0)   Quote laidbackdood Quote  Post ReplyReply Direct Link To This Post Posted: 26 Feb 2020 at 6:40am
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Originally posted by Titahi Titahi wrote:

here is a link to the archived paulus braid testing site...

Thats the holy grail right there......been around for ages and still counts.....
I use PE1 line for squid fishing in aussie ...yet it breaks at 20 pound......In fact if i am snagged ,i am yet to bust off a jig........so no doubt the PE relationship with breaking strain has really changed ......I agree with tanmure kid......most of my casting reels have tasline elite on them of varying sizes .....great stuff.Wink
Once the idiots turn up..Im outta here...No time for Drama Queens.
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Post Options Post Options   Likes (0) Likes(0)   Quote Steps Quote  Post ReplyReply Direct Link To This Post Posted: 26 Feb 2020 at 10:06am
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I cant find the old thread on the subject..
It was good.
Guys talking about breaking off...
I run 30lb coloured Diawa J8 on all my reels.. General fishing for a feed ...
It has handled some big fish fine.
 We also drift SB and straylines over reefs, bouncing sinkers on the reef, so do loose some gear now and again.

To break off on the mainline (braid) becomes expensive to re spool, or the alternative is join the braid ..

I used to run 20lb Floro traces, nail knot type on the hooks (around 92% ) and surgeons loop on the top (cant rem the% think about 80%)
And a bimmini twist (over 95% cats pawed to the swivel/ clip) rated 20lb but they take way way more than that.

If hooked on the reef, drifting it was the trace that gave way, usually around the hook or just above where rubs on a rock or bannicale. If not there the surgeons loop.

Now I use 30lb fluro still get break offs and still in the same places as the 20lb, just not quite as easy.

I dont understand the concern of break offs with the braid strength and loading rods if the trace is used as the weak point????


 I have broken a rod on a big shark thu...in 2 places  around the 1st eye... got it to the boat, about to cut the hook off and he went crazy, rolled up the line, and the tall rod end, a big sweep of the tail hit the rod snaped a 4/5" section out.
 Did cut off a couple meters of braid .
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Post Options Post Options   Likes (0) Likes(0)   Quote coroben Quote  Post ReplyReply Direct Link To This Post Posted: 27 Feb 2020 at 7:51am
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who uses their trace a weak point...? dont understand why you would run 30lb braid (probably breaks at near 50lb) and then run 20lb leader
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Post Options Post Options   Likes (0) Likes(0)   Quote Steps Quote  Post ReplyReply Direct Link To This Post Posted: 27 Feb 2020 at 8:52am
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who uses their trace a weak point...? dont understand why you would run 30lb braid (probably breaks at near 50lb) and then run 20lb leader

 I explained that above.. Its cheap to break off a trace, expensive to break off say 50 meters plus of braid.
 And to add to thats, thats more crap left in the ocean to tangle fish life up.. and on a spin reel leaves the level when casting too low .

Anyway that what Im asking?

I dont understand the concern of break offs with the braid strength and loading rods if the trace is used as the weak point????

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Post Options Post Options   Likes (0) Likes(0)   Quote Rozboon Quote  Post ReplyReply Direct Link To This Post Posted: 27 Feb 2020 at 1:11pm
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If you fish for Kingfish and want braid heavier than your leader you won't get much of it on the reel.

I run 150lb leader for Kingfish. Not because I need to pull that hard, but for the abrasion (and Barracoutta Ouch) resistance.

Not super keen to spool my reels up with 180lb braid.

Also, you'll virtually always break it at the braid->mono knot (FG or PR) anyway. Even though they're high-percentage knots, they're still weaker than straight fishing line.
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