10 - Backstay (runner)
Depending on your sailing boat, there are two different situations:
1) The actual backstay takes the total load without gear. These lines should have high strength low elongation. A single braided Dyneema® SK78 (our D-core) or SK99 is recommended. We also have this rope with extra grip: D-grip.
2) Control lines that run through blocks, with a gear ratio e.g. 1:4 provide less rope tension and less influence of rope elongation. For dinghies we recommend our SSR, SSR light or D-Cup Kmix.