12mm Zip Wire Strop

The idea of placing a strop around a tree or crossbar is to create a good strong anchor point onto which you can attach the wire.

There are a couple of ways that you can install a zip wire, depending on whether you are using a tree or a crossbar at the receiving end.

Do not worry about adding the extra to the length of strop required, as this slackness will be taken up when the wire is being tensioned.

How to measure for a strop:

How do I work out what Strop size to order for a Tree:

The size of strop and the way you work out what size you need to order, depends of the circumference size of the receiving end tree.

Once you have this measurement then follow the simple instructions below.

For tree circumferences that measure more than 1.0m in circumference:
You only need to go around the tree once (your measurement) and then add on 40cm to give you your strop size.
(For example: 2.8m + 40cm = 3.2m strop size to order)

For tree circumferences that measure less than 1.0m in circumference:
You will need to go around the tree twice (your measurement) and add on 40cm to give you your strop size.
(For example: 0.90m x 2 = 1.8m + 40cm = 2.2m strop size to order)


How do I work out what Strop size to order for a Crossbar:

If you are installing your zip wire with a support crossbar at the receiving end, then you would wrap a strop around the crossbar twice.

The way to work out the size of the strop to go around your support crossbar, is very easy if you follow the simple instructions below.

1) Measure the circumference size of the support crossbar and double the measurement (48cm x 2 = 96cm)
2) Then add on 50cm (96cm + 50cm = 146cm)
3) Round this up to 150cm
3) The size of strop you need to order is 1.50m


All our Cable Strops are available in various lengths and in two wire sizes of 10mm or 12mm.