Limb risers (bush deflectors)
Limb risers (bush deflectors) go from bull bar to roof top, and is intended to rise limbs blocking the way when greenlaning/offroading, lift them past the windscreen and over the roof. Thus it will protect vehicle from vegetation - just like what a bull bar does to the front of the vehicle..
I find it not advisable to have such attached to vehicle on-road, as it could cause extreme harm if hitting pedestrians...would probably cut a person in two. So it is necessary to make it detachable. To make it easily detachable, it is based on using shackles up front, and running free behind a roof bar..
For each side, a short length of wire was cut, and pulled through a piece of old hose. In each end made a short loop, and fastened with wire-clamps. Through these two loops runs a shackle to hold it together after pulling around top of bullbar. If bullbar has eyehooks, that's a better way of fastening the wire.
A long lenght of wire runs from this shackle, behind a Thule roofbar, and forward to bullbar on other side, where it is attached to a turnbuckle. Tightening the turnbuckle, the limb risers will go tight, which is needed to lift thicker limbs off top of vehicle. Or the roofbar can be pushed further backwards, which is easiest way of initial tightening the limb risers.