Rope diameter

Rope diameter advice and guidelines for mooring lines, halyards and sheets

Mooring lines: rope diameter advice

Want to know what diameter to choose for your mooring lines? The table below shows our guidelines for the diameters of mooring lines. Mooring ropes made of polypropylene are weaker and need to be thicker. Mooring ropes of polyester or polyamide can be sligthly thinner. If you have a boat that is significantly heavier than average, make sure to chose a thicker diameter mooring line as well. 

Diameter mmMinimum break load kgWeight kg/100 m
2.5 525 3.10
3 757 4.46
4 1350 7.93
5 2100 12.40
6 3028 17.85
7 3850 24.30
8 5040 31.70
10 7870 49.70
12 10600 71.30
14 13400 97.10
16 17940 127.00

Other sizes and information about wire rope 1 x 19 on request.

Mooring lines 8-20 mm are delivered from stock.

The diameters in this table are guidelines, no rights can be derived from this.

 

Sheets and halyards: rope diameter advice

Our guidelines for the diameter of sheets and halyards with a polyester core are shown in the table below. Yachting ropes with high-performance fibers, such as Dyneema® fibers, Vectran or Stirotex® core allow for approximately 2 mm smaller diameters. Typically the diameter of sheets and halyards has to fit in with the clutches, cleats and blocks on board. It's best to chose a rope that is 1-2 mm thinner than the maximum diameter of a block.

Check out our selection of sheets and halyards

Yacht lengthSheetsHalyards
MainGenoaSpinnakerMainGenoaSpinnaker
6-8 m / 20-26 ft 10 mm 10 mm 10 mm 8 mm 8 mm 8 mm
9 m / 30 ft 10 mm 12 mm 10 mm 10 mm 10 mm 8 mm
10 m / 33 ft 12 mm 14 mm 10 mm 10 mm 10 mm 10 mm
11 m / 36 ft 12 mm 14 mm 12 mm 10 mm 12 mm 10 mm
12 m / 40 ft 12 mm 14 mm 12 mm 12 mm 12 mm 12 mm
14 m / 46 ft 14 mm 14 mm 12 mm 12 mm 12 mm 12 mm
16 m / 53 ft 14 mm 14 mm 14 mm 12 mm 14 mm 12 mm
18 m / 59 ft 14 mm 14 mm 14 mm 14 mm 14 mm 14 mm

The diameters in this table are guidelines, no rights can be derived from this.

For competitive sailors it is important to optimize the breaking load with weight savings of a rope. We are happy to work with you on that challenge!

Order your halyard or sheet in our webshop. Are you a regatta sailor, cruiser or dinghy sailor?