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@andypancake
Most of the frames are built using Kasai or tange tubing, both Japanese.
The bikes are tested to destruction every damn day @ 50 velodromes all over Japan.
If you build in one material day in and day out for 40 years, I think you will know as much as there is to know about that material and how it reacts to the riders you have been building for over the same amount of time...