Editor: Otto Tromm | Test date: 14-4-2026
Dyneema is known as the strongest rope fibre per unit of weight in the world — but what happens when that fibre is combined with a gold coating at just 2.0 mm diameter?
The combination is notable, and so are the test results: the figures deviate from what diameter and material alone would suggest.
What is the breaking strength of 2mm Dyneema with gold coating? In our test, this rope broke at an average of 1.99 kN (203 kg), based on 5 measurements.
That is considerably higher than the average of 1.15 kN measured for other 2.0 mm ropes in our test database.
What type of rope is this?
This is a braided rope with a 2.0 mm diameter, manufactured from HMPE fibres (High-Modulus Polyethylene), commercially known as Dyneema.
The rope has no separate core: the construction is a single braid without a core-sheath structure.
The outer surface has a gold coating applied.
HMPE is the lightest fibre in its strength class. It floats on water and absorbs virtually no moisture, meaning breaking strength remains nearly identical wet or dry. Elongation at break is very low — approximately 4% — which means this fibre absorbs almost no energy under shock loading.
The tight load curve observed during the test is entirely consistent with that behaviour.
Typical applications for this rope are in areas where low mass, high strength, and minimal elongation must be combined: precision mechanics, fishing tackle, model making, decorative applications with technical requirements, and applications where the weight of the rope itself is a factor.
Test method
The test was conducted on a universal testing machine with rope-specific clamps, suitable for measuring rope without splices or knots. The test speed was 20 mm/s.
5 separate measurements were conducted on the same product.
No pre-tension was applied prior to measurement. The results are presented below as average, highest, and lowest values.
The test was conducted in accordance with ISO 2307:2019
Test results
Average breaking strength: 1.99 kN (203 kg). Highest measured value: 2.09 kN. Lowest measured value: 1.91 kN. Based on 5 measurements.
The spread between the lowest and highest value is 0.18 kN, indicating a relatively consistent performance across the five tensile tests.
A notable observation during the test was that the rope remained intact until just before the break point — failure occurred abruptly, but was preceded by a clearly tight load curve. That behaviour is characteristic of HMPE: minimal elongation, minimal energy absorption, then sudden failure.
An unexpected observation: the average breaking strength of this coated 2.0 mm rope (1.99 kN) is lower than the breaking strength previously measured for an uncoated 1.5 mm Dyneema rope (T-5835).
This is contrary to what diameter alone would suggest, and may indicate a difference in fibre packing, braid structure, or the influence of the coating on fibre loading.
This warrants further investigation with other diameters from the same product line.
Comparison with other 2.0 mm ropes
To put the test result in context: the average breaking strength for 2.0 mm ropes in our test database is approximately 1.15 kN. This coated Dyneema rope, at 1.99 kN, therefore performs 73% stronger than that average.
For direct comparison:
The difference of 0.84 kN compared to the Kevlar core-sheath is substantial for a rope of the same diameter. Kevlar has a high tensile strength per fibre, but in a thinly braided construction of this size, HMPE clearly has the advantage.
In addition, Kevlar loses strength under repeated bending loads and UV exposure without a protective sheath — HMPE is less susceptible to this.
When to use this rope
This rope is best suited to applications requiring a combination of low mass, high tensile strength, and minimal elongation at small diameter. Applications include:
- Thin connection lines in precision instruments or fine mechanics
- Model making and RC applications
- Decorative applications with a technical strength requirement, where the gold coating also serves an aesthetic purpose
- Lightweight lashing applications where 2.0 mm is sufficient and weight reduction is an objective
The rope floats on water and does not lose strength through moisture absorption. For applications in wet environments, this is an advantage over nylon, which loses 10–15% of its strength when wet.
Limitations
This rope is not suitable for the following situations:
- Shock loading: HMPE has less than 4% elongation at break. There is virtually no energy absorption. Under sudden shock loads — such as a fall or a jerk — the rope can fail abruptly without prior warning. Use nylon (20–35% elongation) for shock-absorbing applications.
- Prolonged static loading at high temperature: HMPE creeps under sustained load at temperatures above 60°C. It is not suitable for permanent fixings in warm environments.
- Knots: Knots reduce the breaking strength of HMPE ropes. Use a splice where maximum strength is required.
- Abrasive environments: The coating offers some protection, but the rope is 2.0 mm thin. With intensive use over sharp edges or rough surfaces, wear is a genuine risk.
Conclusion
This 2.0 mm coated Dyneema rope, at an average breaking strength of 1.99 kN (203 kg), performs 73% stronger than other 2.0 mm ropes in our database, making it best suited to applications where maximum strength at minimum diameter must be combined with low weight.
The anomalous ratio compared to the uncoated 1.5 mm Dyneema warrants further investigation — the results cannot be explained by diameter alone and suggest that construction and coating play a significant role.
This test was conducted by Otto Tromm, who is still trying to understand how a thinner rope without coating can be stronger than a thicker rope with coating — and who will not rest until all diameters have been tested.
The test data were collected by Prorope. This text was generated using AI on the basis of that data and checked for factual accuracy. Read how we test and publish →