RDM mast extensions
RDM mast extensions
The bad ones are eliminated, the good ones prevail. But it remains difficult to pick out the best. Nine out of 21 extensions in the test alone have the same trim fitting. Nevertheless, the variants with different tubes and adjustment systems are numerous and very different. And not everything that appears to be the same actually is. We tried out all the parts extensively on the water and analysed them on land.
Some extensions not only work well, but also appeal to material and technology freaks. In practice, the plastic versions do not have to be inferior to robust and classy-looking stainless steel parts.Some extensions not only work well, but also appeal to material and technology freaks. In practice, the plastic versions do not have to be inferior to robust and classy-looking stainless steel parts.

It's just a piece of tube with a clamp - and yet it's the part that's often the reason why the O-tone when rigging is only free from the age of 18: ropes that don't want to go through the pulleys, run back and forth, the extension slips off your foot - and meanwhile the Dyneema loop slowly cuts off your fingers. Here you will find a wide selection of extensions, with the right one for every sail. So that it rolls like clockwork in the future. Here are a few general findings from our test:

The rope runs through the extension with minimal frictional losses when neatly threaded.The rope runs through the extension with minimal frictional losses when neatly threaded.

Many brands, fewer variants Eleven brands in the test, but there are significantly fewer brands that produce or design their own sails. North Sails and NeilPryde show completely in-house developments, the new Severne extension also has a largely independent design. The other brands combine the available tubes, trim cups and adjustment systems quite cheerfully. The identical trim cup can be found a total of nine times: At Gaastra (Team Alu, Team Carbon), the cheaper North extension, RRD, ProLimit (Alu Skinny, Carbon Skinny), Simmer and Unifiber (Alu HD, Carbon). It is also worth comparing the prices. However, not everything that looks identical at first glance is actually identical on closer inspection. For example, the trim fitting on the shiny golden Unifiber extension is made entirely of stainless steel, while ProLimit offers the same part at a lower price, but only with an aluminium block. The stainless steel clamps will certainly last longer. With only three failures in six weeks of testing (Tecno Limits Alu: bent; Unifiber Alu RDM: knob broken off; Simmer Carbon: carbon already splintered before use), the overall result is pleasing, but the testers once again particularly liked some of the extensions.

The test of the 21 RDM extensions is available below as a PDF download:

Downloads:

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