This Rhino-Rack Horizontal Crossbar set fits the Pioneer Platform with 5 planks. This is a pair of crossbars that run horizontally across your platform tray so you can attach cargo boxes bike carriers kayak cradles and more- just as you would on traditional Rhino Rack crossbars. With this crossbar upgrade you get all the cargo capacity of the platform with the functionality of the C channel attachment option. Includes a pair crossbars vortex rubber strip end caps and all attachment hardware. Crossbar Width: 53.54in 1360mm suitable to fit 5 plank trays.