I have a 10mm rope which I would like to use for recreational tree climbing. I do like rope wrench setup a lot for its simplicity. However, rope wrench spec suggests using rope thicker than 10mm, I believe its 11-13mm. Is it possible to easily customize the rope wrench to take a 10mm rope? I wonder if changing a pin would have needed effect. Maybe I could use without any modifications? Any thoughts?
Is rope wrench on a 10mm rope possible?
- Thread starter bunufi
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- rope wrench
moss
Been here much more than a while
- Location
- Carlisle, Massachusetts, U.S.
A relevant question is will a rope wrench run well on a narrow diameter kernmantle line? 10mm HTP not good, BobBob’s 10mm EZ-Bend sounds good. Mileage will vary depending on what 10mm you have.
-AJ
Awesome @Bob Bob! This gives me hope.
Really cool video. I would get friction hitch without eyes and dial in the correct length using fishermans. And there are 8mm friction hitches on sale.p.s some elevator music at the end of the video. haha. how appropriate.
I had the same thought @Jonny , but was not sure. Might give it a go if it would not work directly on the rope without mods.
I have never considered looking at this metric. Thanks for pointing out. This is the rope I have:
Performance Static 10.0 mm | Static Ropes | Edelrid
Combines superb abrasion resistance and low elongation with excellent handling ...
moss
Been here much more than a while
- Location
- Carlisle, Massachusetts, U.S.
I have never considered looking at this metric. Thanks for pointing out. This is the rope I have:
Spec says it has lower sheathing content than EZ-Bend. Edelrid's 37,00% vs EZ-Bend's 42.8%. So kernmantle should be ok. Am I looking at the right thing @moss?Performance Static 10.0 mm | Static Ropes | Edelrid
Combines superb abrasion resistance and low elongation with excellent handling ...www.edelrid.de
I think the core construction and fiber makeup is the key. For example Sterling HTP is “high tenacity polyester” with a “parallel core”. HTP stiffens dramatically when loaded, I believe this is why the wrench is not as good as it could be on 10mm HTP.
I think that core dependent kernmantle construction lines are the only type of rope available in 10mm that meet the ABS (average breaking strength) minimums we typically want for tree climbing. So the question is which 10mm kernmantles will actually work well with the wrench?
If the goal is to keep your gear light I would look at foot per pound numbers, for example 11mm double-braids like Velocity or Blaze are fairly light.
I think that the only way to know how well the 10mm Edelrid works with the wrench is try it or hear from someone who has. I don’t doubt that it will work and I don’t think it will be unsafe but the question is will it work well/smooth etc.
-AJ
moss
Been here much more than a while
- Location
- Carlisle, Massachusetts, U.S.
Several climbers have reported the core bunching/malforming after multiple climbs on the Rope Wrench paired with 10mm Sterling HTP. Just a heads up that few a climbs are needed to assess how well any of the core dependent kernmantles in the 10mm or less range will work with the wrench.
Definitely a good first step to simply hang on a line to determine basic wrench functionality.
-AJ
Right, just showing it would be safe to do. I agree about the 10mm HTP, the cover can bunch,allowing the core strands to move around. I milk it back to the ends to keep it flexible, but I use just a hitch. The 9mm’s cover is so tight it just turns to a stiff cable, and also it’s small diameter can be problematic.
TREEfool
Participating member
- Location
- Sioux Falls, SD
x2 ...I used it succesfully on 9mm htp also but I had a hard time figuring out which cord and knot to use
brydan
New member
- Location
- deep south
I had to do some tinkering to get mine to work on 9mm HTP. Started with 6mm Ocean and a Knut hitch but the hitch was binding up before the wrench was engaging fully. Didn't have any o-rings on hand so used whipping twine to build up some material on the tether eye to keep the wrench from going fully into neutral. That worked substantially better to get the wrench to engage in sync with the hitch. Also switched to 8mm Ultra Tech/Knut, wish it would grab slightly better but some hitch experimentation can probably fix that.
Found my o-ring kit so going to add those in place of the whipping twine which should work better. Another thought was to add a little friction to the wrench by using some gaffer tape or something to build up the sheave diameter instead of trying to mess with the slic pin.
Found my o-ring kit so going to add those in place of the whipping twine which should work better. Another thought was to add a little friction to the wrench by using some gaffer tape or something to build up the sheave diameter instead of trying to mess with the slic pin.
The o rings without a bump seems to put the Wrench at near neutral, with the pin barely touching the rope. This makes it engage each time, but leaves very little friction when going up the rope. 7mm Coppa 5000 grabs reliably with a Michoacán on the 9mm HTP.
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TREEfool
Participating member
- Location
- Sioux Falls, SD
@Brocky ...how much climbing have you done on your 9mm htp with the wrench?
I came to the forum today to see if anyone has figured out a reliable ropewalking system for smaller ropes. I've been setting up highlines in the canopy with my friends a lot lately and Im getting tired of my yoyo setup.
But the most important thing for me is space conservation in my pack and im not gonna go up in rope size just to use a rope runner or wrench. What is your full setup?
I came to the forum today to see if anyone has figured out a reliable ropewalking system for smaller ropes. I've been setting up highlines in the canopy with my friends a lot lately and Im getting tired of my yoyo setup.
But the most important thing for me is space conservation in my pack and im not gonna go up in rope size just to use a rope runner or wrench. What is your full setup?
TREEfool
Participating member
- Location
- Sioux Falls, SD
Thank you for the photos! I need to find a vid of this to see it in action.
I don’t know of any videos, it’s easy to try, just a 4-2 VT, with a ring, or circular substitute, and a twist instead of the second braid, for basic version. The amount of friction of the wraps can be adjusted by changing the distance between the ring and wraps.
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