
Introducing the ISC ZipSpeed XTREME Trolley, the premier choice for high-speed zip lines where noise reduction is critical. Developed in collaboration with the world’s fastest zip line, this trolley is engineered to perform at over 160kph (100mph) while significantly reducing sound output. This is a crucial advantage for operators seeking planning permission near residential or wildlife areas. The innovative design features noise-dampening polyurethane tires and a unique Noise Reduction Anti-Rollback Cam (NRARC) that uses an ‘air paddle’ to prevent contact and noise during the ride. Durable, fast, and remarkably quiet, the ISC ZipSpeed XTREME Trolley is the ultimate solution for high-throughput attractions that demand world-class performance and minimal environmental impact.
The ZipSpeed XTREME Trolley has been designed to address the issue of sound emissions, in response to increasing pressure for zip operators to take a pro-active approach to reducing the noise generated from zip lines. The ability to minimise noise in consideration of the effect on local residents and wildlife, plays a pivotal role for operators who are seeking local authority planning permission, for installation of zip lines at their sites. We relished the challenge and set about the task of developing our Trolley to dramatically reduce sound output, whilst maintaining the key performance features.
The ZipSpeed XTREME Trolley is capable of performing at speeds of over 160kph (100mph), with the durability to satisfy the demands of a high through-put visitor attractions. The ZipSpeed XTREME Trolley has side plates which are specially designed to optimize the vibration frequency which forms as a result of the trolley travelling along the zipwire. Optimising the vibration frequency in this way results in a significant reduction in noise output. The ZipSpeed XTREME is also fitted with Stainless Steel wheels, which support special noise-dampening Polyurethane tyres. These special tyres are designed to contribute to sound reduction, by further reducing the amount of vibration frequency that passes from the cable, through to the side plates of the trolley.
The ZipSpeed XTREME is suitable for use on industry-standard Zipline cables, however for maximum performance, durability and lowest possible noise output, we strongly recommend the use of smooth-surfaced ‘Interlocked’ cable.

Noise Reduction ARC (NRARC)
The ZipSpeed XTREME Trolley is available with a special Noise Reduction ARC Cam system (NRARC). During normal use, the ARC cam trails allowing the trolley to roll forwards, unhindered. However, as soon as the trolley begins to roll backwards, the cam is engaged, bringing the trolley to an immediate halt. This anti-rollback function captures the progress of the trolley, which means that even when the trolley doesn’t reach the end of the zip line, it cannot roll backward and hence rescue distance (and therefore, rescue time) is significantly reduced. Standard ARC cams generate sound as they intermittently come in to contact with the cable, as the Trolley travels. The special NRARC cam on the ZipSpeed XTREME Trolley works together with an ‘air paddle’. The air paddle fully disengages the NRARC cam and prevents it from touching the zip wire, while the trolley is travelling forwards. This means that the NRARC cam does not generate sound, during the zip ride.
As the trolley reaches the end of the run and slows down, the air resistance on the air paddle decreases and the air paddle springs back to its normal/upright position. This allows the NRARC cam to engage on the cable, ready to prevent the trolley from rolling backwards. When not in use and/or during transportation the air paddle can be pushed forward and flat (within the side plates), for protection from damage.
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ISC ZipSpeed XTREME TrolleyPrice range: € 1.731,00 through € 1.892,00 Ex VAT -
ISC ZipSpeed-L TrolleyPrice range: € 231,00 through € 326,00 Ex VAT -
ISC Zipspeed-S TrolleyPrice range: € 191,00 through € 283,00 Ex VAT
Brake System Compatibility
The ZipSpeed XTREME is equipped with twin steel-reinforced impact bumpers, mounted onto high grade Aluminium frames, allowing impact speeds into the braking system up to 80kph (50mph). The ZipSpeed XTREME is also compatible with Impact Trolley braking systems.
The ZipSpeed XTREME has a Fender attachment, which pushes the brake system restraint line off to one side of the trolley. This allows optimal engagement with the end of line braking system and protects the Noise Reduction ARC cam components from becoming damaged, by the end of line braking system.
The frames of the ZipSpeed XTREME are designed to allow the option of using a ‘grab rope’ system. As the trolley approaches the end of the run, it travels under the grab rope which then engages with the specially shaped recess in the rear of the frames. This action ensures that the zip trolley does not roll back down the line away from the finish platform.
ZipSpeed Superman-style XTREME Harness
The Superman-style harness offers riders a high adrenaline flight experience, with an aerial perspective of the scenery beneath! The ZipSpeed XTREME Harness is available in four sizes, suitable for children and adults.
The Hardware Behind a Safe, High-Volume Zipline Operation
The products below are used and specified in the techniques described above. Click any item to explore full specifications and request a quote.
How Automatic Reset Braking Keeps High-Volume Ziplines Running
Magnetic eddy-current braking with automatic reset — ideal for high-throughput commercial courses where minimising staff intervention between riders matters.
Why Modular Spring Braking Is the Operator’s Safety Baseline
The modular go-to for operators who need reliable primary and emergency arrest capability. Configurable to your specific rider weight range and arrival speed.
What It Takes to Safely Stop a Rider Arriving at 72 km/h
Engineered for mega-ziplines running at up to 72 kph. The benchmark high-velocity arrest device for operators running the fastest commercial lines.
The Prone Position: How Superman Ziplines Demand Specialist Harnessing
The specialist prone harness for headfirst Superman configurations — redesigned for faster guest harnessing and a more comfortable ride position.
Trolley Longevity vs. Arrival Speed: Why You Don’t Have to Choose
Built to absorb the impact at landing without compromising speed on the line. The choice for courses where trolley longevity and smooth arrival are both non-negotiable.
Heavy Loads, Long Runs: Specifying Trolleys for Serious Commercial Operations
ISC’s large-capacity trolley for high-load commercial operations — built to the bearing quality and durability standards that serious operators expect.
Browse the full Zipline Safety Solutions range →
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