The Yakima Rack and Roll Safety Pole is a 40 in. tall bright yellow fiberglass Safety Pole that attaches to your crossbar or trailer frame. The Yakima Rack and Roll Safety Pole makes your trailer more visible at all times. Especially useful for backing up.
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I purchased these to go on an aluminum cargo carrier mounted on the front of my F-350. You can't see the carrier even with cargo in it do to the high front grill of the F-350. I mounted them using a modified mounting method. I replaced the hardware with stainless steel bolts but used the plastic wing nut they included for the round trailer frame mount (my cargo frame is square stock). That way they are bolted through but I can still remove them quickly for storage. These make all the difference adding visibility to the front of my cargo rack!
The poles work. I put 2 of them onto my Rack and Roll trailer, and I can now see the trailer through the back windows of my van. I also tied red ribbon to them which helps draw attention to the trailer. These do exactly what I wanted them to do.