In this remix of the roll bar clamp, all that was changed was some added gussets to hopefully strengthen it in key areas. I modified one, then mirror imaged it for separate left and right parts.
45mm/1.75" inner dia closed, but could be resized to fit bar.
I thank the original designer for posting.

***EDIT -I have resized a set for a 1 5/8" bar per a request, although I have not test printed them yet. Nut sockets and bolt holes will be a fuz smaller than the prints sized for the 1.75" bar. If you print them for a 1 5/8" bar, send me a msg if they worked well or not. Thx

i3

No

Yes

40%

Supports must be used "Everywhere", not just base plate.
I printed @ 40% infill and they seem very strong.

Print must be printed with support "everywhere", not just baseplate.