NTR Zipline Spring Brake – Extra Long 5.3ft, Heavy-Duty Backyard Zip Line Stopper for 3/8 Inch Cable

Overview

Meet the NTR Zipline Spring Brake, a purpose-built, extra-long braking solution designed for backyard ziplines. Measuring 5.3 feet, this high-strength compression spring pairs with 3/16 to 3/8 inch cables to help manage speed and create a controlled stop. It’s built for safe operation on gentle slopes and supports riders up to 350 lb; for longer runs or heavier riders, you can add more springs to increase stopping power.

Designed with real-world use in mind, the system emphasizes predictable braking behavior over sudden halts. The result is a calmer end to the ride that aligns with common backyard setups while leaving room for customization as your zipline grows.

Key benefits

• Compatible with common zipline cables: 3/16, 1/4, 5/16, and 3/8 inch diameters.
• Long-lasting, weather-ready construction with a stainless steel spring and rubberized stoppers.
• Tool-free installation in minutes; one-piece rubber ends keep alignment secure.
• Durable design that stands up to seasonal temperature changes without cracking or loosening bonds.
• Value and support: warranty-backed and responsive customer care from NTR.

What you get

• One-piece rubberized stopper paired with a bonded stainless steel spring
• Compatibility for multiple cable diameters and setups
• Clear guidance and warranty coverage from NTR

How it works

The braking force comes from spring compression rather than sheer length. As the rider approaches the braking zone, the spring compresses to absorb energy and slow the cable in a progressive way. This helps reduce abrupt transitions. If you have a longer line or a heavier rider, you can add additional springs to boost stopping power.

Installation and care

Install in 1–2 minutes without tools—simply thread the zipline cable through the rubber ends and secure. Regularly inspect the spring and rubberized stoppers and replace as needed to maintain reliable performance.