Wut? Are you saying that no bikes are made with thin-walled tubing? If that were true, there would be no point to even having specialty steels like 853. As it is, one has to wonder why the vast majority of the available tube configurations offered in such expensive and esoteric steels are the same ones that have been available forever in simple CrMo and MnMo. If you are going to have the thickness, you don't need the higher steel strength. If you are going to have the higher steel strength, you don't need the thickness. Why the insistence on doubling up? What is the point?