Zip. Stop. Repeat. The best brake for your zip line, the zipSTOP IR is best suited to rider arrival speeds up to 60 kph (37 mph).
What Makes the IR Different From the Standard:
The IR stands for internal reduction. This device cannot be used with an external reduction line setup. It is already engineered as a mechanical 2:1. The benefits of the IR include simpler installation, no external reduction lines (although you will still need a redirection line), and the capacity to handle a wide range of rider arrival speeds with more mounting options (such as the pivot mount).