Cobra 2 - slackline pulley system

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COBRA 2 – Facelift


Features compared to the previous version of Cobra 2:

  • optimized large oval shaped center – now even Green Pins up to 2 t WLL fit with eye
  • Milled radii in multifunctional holes and large oval shaped center – optimized load bearing
  • Refined look of surface and inscription – now in brushed anthracite

Life among the animal kingdom is treacherous but through the kindness of nature the
Cobra series remained tenacious.

By applying engineering expertise at its best the Cobra 2 is the result of dedication and passion. Its predecessor has been entirely overhauled and perfected with the knowledge from long field experience.
Unlike traditional pulleys the
Cobra 2 is customized for its particular purpose: slacklining. The new concept completely refrains from integrating pre-built components but takes it to the next level. The Cobra 2 is a state of the art pulley being the most efficient, lightest and compact system for today’s slackliner.

The special surface is highly scratch resistant and gives the Cobra 2 a brushed finish in decent anthracite. As an optic finish the One Inch Dreams logo is engraved with high precise laser technology.

All relevant components are made of high quality stainless steel. Weight bearing aluminum parts have been dispensed altogether. The two double pulleys are each mounted on a stainless steel plate. Together they comprise the heart as well as the muscle of the system. 

The large oval shaped center accepts numerous connectors such as but not limited to:

  • standard shackle up to 16 mm with the eye / 18 mm with the pin
  • industry & Van Beest Green Pin shackles up to 2 t Working Load (WLL) with the eye and up to 3,25 t WLL with the pin
  • oval and delta quicklinks from 8 to 12 mm

Features four multifunctional holes for connecting the rope brake
Tapir, static rope or extra single pulleys to increase the mechanical advantage. By default the Cobra 2 has a 5:1 base configuration which provides you with a 15:1 theoretical mechanical advantage (TMA) and has a recommended WLL of 10 kN. By adding two more single pulleys (7:1 base) you can increase both the TMA and WLL to 21:1 and 14 kN respectively.

In the process of the facelift of Cobra 2 the
oval shaped center and multifunctional holes have gotten milled radii at the inner edges. Thus connectors and Hydra have a positive fitting, which results in a material friendly and optimized load bearing.

The unique concept of the single pulley allows for quick one-handed attach and detachment without the need of redundant metal connectors. Thus weight and complexity has been further optimized in favor for a clean and light weight solution. The overall weight to performance ratio is tremendous, with a total of 1450 g (including 20 m rope) the Cobra 2 is less than a third of the weight of similar efficient pulley systems. This allows for lighter and more compact backpacks. Using an ultralight 6mm dyneema rope with a protective polyester sheath, the need for heavy and bulky static rope is gone. The dyneema material allows the rope a nearly zero stretch which in turn makes tensioning a charm.

The Cobra 2 guarantees a high level of safety for all fields of application. Its innovative construction has been made simpler and more intuitive. Particularly with regards to the new rope brake Tapir, evolution has stepped up.

Tapir: the rope brake without compromises

  • Easy to handle, highest safety standards, unbeatable in weight and efficiency.
  • In order to create an extremely light, efficient and safe rope brake for smooth slackline rigging, no expenses or efforts were spared.
  • With the revolutionary design the total weight of the brake has been reduced to merely 109 g!

A more detailed description is available on the product page of the Tapir.

extent of delivery:

2x Cobra 2 double pulley
1x rope brake Tapir
1x rope in desired length
1x Hydra single pulley
2x 6mm niro shakle
1x 4mm niro shakle
1x Niro Snap Hook
1x prusik adapter incl. prusik cord
1x replacement prusik cord
1x users manual

recommended accessoires:

1x centering tube for 12mm Niro shakle
1x 12mm Niro shakle

Working Load Limit (WLL) 10 kN (5:1 Base), 12 kN (6:1 Base) or 14 kN (7:1 Base)
Minimum Breaking Strength (MBS) 40 kN (~8992 lbf)
Slipping Threshold of rope brake 120% of WLL
Transmission base system 5:1, 6:1 or 7:1
Transmission multiplier 3 : 1
Tranmission whole system 15:1, 18:1 or 21:1
Material roller body: AL 7075, bearings: corrosion-resistant steel, all other parts: stainless steel
Weight 1188 g - 3788 g (2.62 lbs - 8.31 lbs) - depends on rope length
Recommended for Lowlines, Longlines, Waterlines & Rodeolines


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