Dyneema - Cruising and Racing Comparison

Jimmy Green Marine offer a range of polyester ropes with Dyneema core, broadly categorised as

Cruising Performance  ~  High Performance  ~  Extreme Performance

Dyneema SK78 is significantly more expensive than polyester.
Cruising Dyneema offers a performance edge over 100% polyester without incurring the full cost of Racing Specification Dyneema.
Dyneema SK38 is a lower specification dyneema which falls between 100% Polyester and Dyneema SK78 in terms of strength and stretch
Dyneema SK99 (extreme performance) is even more expensive than SK78.

LIROS engineer a cost effective Cruising Performance solution by reducing the amount of Dyneema SK78 in the core compared with High Performance
The Marlow Cruising Performance solution employs a full Dyneema core but in a lower specification SK38

Cruising Performance Dyneema: LIROS Dynamic Plus

  • A reduced diameter Dyneema SK78 core
  • A full sacrificial polyester mid layer
  • A full hard wearing polyester outer Jacket.

The reduced Dyneema core provides a moderate increase in breaking strain and a considerable reduction in stretch when compared with a rope of 100% polyester construction.

Cruising Performance Dyneema: Marlow D2 Club

  • A full diameter Dyneema SK38 core
  • A full hard wearing polyester outer Jacket.

Marlow estimate that the stretch characteristics (governed by the lower specification SK38 core) will be approximately 2.5-3% compared with 4% for Marlowbraid and 2% for LIROS Dynamic Plus.

High Performance Dyneema: Marlow D2 Racing and LIROS Racer Dyneema

Both of these lines feature:

  • A full racing specification Dyneema SK78 core
  • A full hard wearing polyester outer Jacket.

The full Dyneema core provides a significant increase in breaking strain and a considerable reduction in stretch when compared with a rope of 100% polyester construction. LIROS Racer Dyneema and Marlow D2 Racing are constructed differently. LIROS Racer Dyneema has a very thin sacrificial mid layer, Marlow D2 Racing does not.

Extreme performance Dyneema: LIROS Control XTR and any lines from the Marlow MGP range that feature a higher specification core than Dyneema SK78

LIROS Control XTR has a Dyneema SK99 core.
Other high specification cores include super pre-stretched SK78 Max, SK90 and Vectran.

All extreme performance lines feature:

  • a full Extreme Performance Dyneema Core. E.g. Dyneema SK78 Max, SK90 or SK99
  • No sacrificial mid layer.
  • A full hard wearing polyester outer Jacket.

Extreme Performance Dyneema delivers even greater break load and less stretch than High Performance Dyneema

12mm DiameterApproximate StretchManufacturer Minimum Break LoadJGM Retail Price per metre, January 2018
LIROS Polyester Braid on Braid5%3200kg£3.90
LIROS Dynamic Plus2%4800kg£10.40
Marlow D2 Club

2%

4680kg£9.50
LIROS Racer Dyneema< 1.5%7200kg£13.10
Marlow D2 Racing 78< 1.5%6250kg£13.50
LIROS Control XTR<1%11200kg£27.00

Please Note

To complete a successful core dependent splice, the outer cover needs to accommodate a double thickness of the Dyneema core.
Therefore, when splicing Marlow D2 Competition, LIROS Dynamic Plus and LIROS Racer, the sacrificial mid layer is cut away approximately 2.5 metres from the end in order to make room for the double thickness Dyneema.
The removal of this mid layer results in a reduction in the finished rope diameter over the last 2 metres of the line.
This reduction is more pronounced on both Marlow and LIROS Cruising Dyneema.

Although there are subtle differences in their construction, both Marlow and LIROS have designed their dyneema core ropes to be spliced by the same method.

Both LIROS and Marlow recommend the core dependent splice for their dyneema core ropes.