CTSC 5/16" (8mm) Zipline Anchor Cable Sling – CTSC
CTSC 5/16" (8mm) Zipline Anchor Cable Sling Wire Rope
"Commercial-grade heavy cable. The 5/16" thickness and steel thimbles give us complete confidence for our adult high-tension line. Rigged easily through tree protectors." — Verified Buyer (★★★★★ 4.95/5 from 24 reviews)
🎁 Bundle & Save: Buy any 2 accessories and automatically get 10% off at checkout! Plus, use code HALLOWEEN10 for additional seasonal savings and free US shipping on orders over $99.
Create an uncompromising heavy-duty tree anchor for high-tension runs, commercial adventure courses, and adult riders up to 350+ lbs. The CTSC 5/16" (8mm) Zipline Anchor Cable Sling (also known as a start cable or anchor tree wrap) is manufactured from extra-heavy 7x19 galvanized aircraft steel wire rope, proof-tested to an extraordinary 9,800 lbs minimum breaking strength. Finished with dual reinforced steel thimble eye loops swaged with heavy-gauge industrial sleeves, this sling creates a safe, isolated anchor point that protects both your live trees and your main zipline cable from stress and wear.
🛡️ Key Features & Commercial Rigging Advantages
- Extra-Heavy 5/16" (8mm) Aircraft Wire Rope: 7x19 high-density strand construction provides immense tensile strength while flexing cleanly around tree contours.
- 9,800 lbs Proof-Tested Breaking Strength (MBS): Delivers a commercial-grade 1,960 lbs safe working load limit (at a 5:1 safety factor), engineered specifically for high-tension spans, commercial courses, and heavy adult use.
- Dual Reinforced Steel Thimble Eyes: Heavy-gauge galvanized thimbles inserted into both swaged loop ends eliminate wire crimping and metal-on-metal friction from turnbuckles and shackles.
- Protects Primary Cable & Anchor Trees: Avoids bending or damaging your main zipline cable, ensuring smooth tensioning and simple winter disassembly.
- All-Weather Galvanized Protection: Hot-dip Class A zinc coating resists harsh moisture, acid rain, salt spray, and extreme sub-zero winter temperatures.
📏 Tree Sizing & Circumference Guide
| Sling Length | Recommended Tree Trunk Diameter | Maximum Tree Circumference |
|---|---|---|
| 8 Foot (2.4m) | Up to 24 inches (2.0 ft) | Approx. 75 inches (6.2 ft) |
| 11 Foot (3.35m) | Up to 36 inches (3.0 ft) | Approx. 113 inches (9.4 ft) |
| 14 Foot (4.27m) | Up to 45 inches (3.75 ft) | Approx. 141 inches (11.7 ft) |
| 16 Foot (4.88m) | Up to 52 inches (4.33 ft) | Approx. 163 inches (13.6 ft) |
Pro Tip: Measure tree circumference at the exact installation height and allow 1–2 feet of clearance for turnbuckle and shackle attachment.
📐 Technical Specifications
| Product Type | Heavy-Duty Zipline Tree Anchor Sling (Start Cable) |
| Cable Diameter | 5/16 Inch (8mm) |
| Wire Construction | 7x19 Heavy Aircraft-Grade Galvanized Steel |
| End Terminations | Dual Heavy-Duty Steel Thimbles with Swaged Sleeves |
| Minimum Breaking Strength (MBS) | 9,800 lbs (43.6 kN) Proof Tested |
| Safe Working Load Limit (WLL) | 1,960 lbs (890 kg) with 5:1 Safety Factor |
| Compatible Hardware | 1/2" Jaw Turnbuckles, 5/8" Shackles, Heavy Rigging Quick Links |
| Corrosion Protection | Class A Heavy Hot-Dip Galvanization |
🔧 3-Step Anchor Rigging Walkthrough
- Step 1 — Tree Protection: Position CTSC Tree Protectors or hardwood blocks around the tree to protect the bark and cambium layer.
- Step 2 — Wrap Sling: Pass the 5/16" sling around the tree pads, bringing both thimble loop eyes forward toward the course run.
- Step 3 — Turnbuckle Connection: Pass the clevis pin of a 1/2" jaw turnbuckle or 5/8" anchor shackle through both loop eyes and lock securely before final line tensioning.
📦 What's Included in the Box
- 1 × CTSC 5/16" (8mm) Galvanized Steel Zipline Anchor Cable Sling (Selected Length)
- 2 × Pre-Installed Steel Protective Thimbles with Swaged Sleeves
🤝 CTSC Quality & Guarantees
- 1-Year Manufacturer Warranty covering wire rope and swaged eye terminations
- 30-Day Money-Back Guarantee
- Free Express US Shipping on orders over $99 (delivered in 3–4 business days)
❓ Frequently Asked Questions
Q: When should I choose 5/16" sling over 1/4" sling?
A: Choose 5/16" for long spans over 150ft, courses carrying adult riders up to 350 lbs, or when pairing with 1/4", 5/16", or 3/8" main cables. The 9,800 lbs rating provides ultimate safety margins for heavy continuous use.
Q: What turnbuckle works best with this 5/16" sling?
A: We recommend the CTSC 1/2" Galvanized Steel Jaw & Jaw Turnbuckle (4,000 lbs WLL), which fits cleanly into both thimble loops.
- Supports up to 800lbs
- CE & RoHS Certified
- Designed and tested with your safety in mind.
1、In order to make your order to arrive more quickly and securely, we will deliver the goods within 24 hours after receipt of order payment. Please ensure that your order address is correct.
2、Before delivery, we will inspect and pack the goods to ensure that the goods received by our customers are in good condition. If there are any problems with the goods, please contact us at the first time.
3、We offer free delivery service,express delivery is estimated to be delivered within 3-4 days.The shipping time during Holiday Season (Christmas etc) could be longer than usual time. Please add another 5-10 days as a delay.
Note：if your shipping address is in a remote area, the express delivery service will require additional delivery costs, and we will not pay for this freight. So we will contact you for the first time, and you need to pay the freight, then we will deliver the goods.
We promise to do the right thing. Over the years, every decision and product we make is focused on customers. Our goal is to bring more joy to those who believe in us. We should be responsible for doing the right thing and the right way.
The products we produce bring laughter to our customers, and we are truly proud of them. If our products cause trouble to our customers, we sincerely feel sorry and try our best to make up for our mistakes. Customer satisfaction is our eternal pursuit.
We promise never to exaggerate the quality of our products. We strictly test every product to ensure that it meets the safety standards and passes the quality certification.
We promise if there are any problems with our products, please contact us in the first time, or you can request a return or refund within 30 days of receiving the product, but please contact us before returning，you just pay for the return shipping. No strings attached.
After using our products，if you are satisfied with our products and services, please 5 stars, if you are not satisfied, please contact us at the first time, we will handle it for you and make you satisfied.
1、Please strictly follow the instructions and ensure the installation is solid.
2、Kids under the age of 10 need to use zipline under the guidance of adults or guardians.
3、Strictly follow kids and adults with a weight limit of 250 pounds.
4、Heart disease and hypertension patients, pregnant women, please do not use products, in order to avoid accidents.
5、Installation between two trees or ends is required, and there is a clear runway between the two without shelter, preferably with a slight slope in the middle of the runway.An end-to-end slope of 3-6%.
Instruction Book Installation Manual: For Installation Video Please See Blog
