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@gbj_tester
They have the science of actually being wind tunnel tested, and the additional benefit of being available and actually slowing you down. No unobtanium, though; just aluminium, stainless steel and ABS plastic. If there is a 1980s brake which you should buy second hand instead of the new TriRig, it is DuraAce AX BR-7300, still the most aero mass produced brake pending wind tunnel tests of the production TriRig