The mud flaps I put on the truck when we got it don't offer enough coverage when we're pulling the boat and I didn't like what I found on the market.
So, I made my own, I started with items I already had on hand, steel stock and a never used tailgate protector
I took a piece of square tubing and cut it so when inserted into the Superhitch it sticks out about an inch on each side, I drilled one hole at each end for pins.
Since I didn't want to weld or drill into the superhitch and compromise it's abilities... I used Oak wedges on each end and set them with a 3lb sledge. (Trust me it's not going anywhere)
Each mudflap tube is extended half way into the support tube and pinned with keeper pins. These are as easy to install and remove as my torklift tie-down brackets.
To fill the open end of the tube I inserted a piece of treated wood and curved the end to protect passing legs when the camper is not on the truck.
Not bad, I may have to do something like that, since I have changed tires with a more aggressive tread pattern they are holding rocks. Is the cross tube on your Superhitch 2.5" tubing? And also is it bolted on the frame mounts?
1999 F350 4WD CC SRW V-10, 4.30 Tow Package, HD Camper Package.
2004 Northstar 850SC with 3 jack Stable Lift.
2006 Triton Frontier 17 with 60hp Merc 4 stroke tiller.