Originally posted by old&slow
Bit of an age old argument there - it's not the tubes, they're plenty strong - it's the craftsmanship of the guy putting them together ! You'll find that some of the best builders will actually mix tubes from different sets to better suit a particular rider or frames at the large or small end of the scale. If you're careful what you buy I don't believe it's a problem in any way. The durability issues that some people may argue about are, again, not about the tube runs but the areas of tube joins and the quality of the tube end profiling and welding/heat treatment.