I made my 7’4” rod tube and now I need to mount it to my car roof rack. I’ve been having trouble finding U-bolts to fit the 4” tube. Anyone have ideas on where to find them. My local hardware stores don’t carry anything larger than 3.5” U-bolts.

how many rods can you fit in a 4" tube?  seems awful small.  As far as how to mount it to your rack they are pretty easy to find on amazon.

https://www.amazon.com/dp/B0041NT9TU/ref=twister_B079J55N53?_encoding=UTF8&psc=1

You can also look at these kits as well and I am pretty sure you can get just their saddles and bolts from somewhere as well.  I just didn't feel like looking for them.  I have one of their 8" kits sitting in my garage right now jut waiting to go get the 8" diameter pipe

Take a look at Rhino-Rack LSE100H end cap with 4.312 ID (check your tubing OD), Rhino makes U clamps for thier racks. Check local RV trailer supply co for threaded U clamps to fit 4" ID PVC tubes.

Tom

 

I use bungee chords, radiator clamps, or big zip ties, or in a pinch rope, I am a Sailor after all.