[lsloth]

I got some 1.75 .090 tube. Do you guys think this is thick enough for flat bed? None of the role cage will be made from this just the flatbed itself.

 

[sceep]

sounds good to me.

 

[peej23]

yes is good

 

[welndmn]

IMO depends where you use it, .90 wall is typical of exhaust tube, and I can jump on and dent it.
For the fram of the flat bed I would use .120