Speardiver Wishbone Line
Speardiver wishbone line for the US market is made from Spectra, not Dyneema. Dyneema is cheaper and has more filaments per denier (approximately 10 to 1) making it softer causing it to abrade and wear out faster. Dyneema is used when price is more important than performance or if a softer line is required. Rob Allen wishbone line is made using Dyneema as it is less expensive to produce. It has a rating of 400 lbs or 180 kg. The Speardiver 1.8 mm wishbone line manufactured for the North American market uses a higher grade of Spectra and is rated for 600 lbs or 272 kg. The outer braid of the line is 52 to 59 pick which is the maximum possible for line of that diameter. The line is then top-coated with polyurethane to seal the line and further increase abrasion resistance.
1.8 mm is the diameter that best fits in notched spears. Thicker line will not completely settle into the notch, and may catch on the top sharp edge of the notch.