This Option can be added to the KR2B56 rack model when it is ordered and it is for the frame to be widened so the four bikes can be carried as shown in the photo and two kayaks. You must order two sets of the bike racks also when placing your rack order and adding this option. This wider base option covers a wider rack frame being made to accept four bike channels as shown below.
We recommend the LED Lighting when using the wider rack. This works best on motorhomes. If you want to do this on a fifth wheel your hitch will most likely need reinforcement.