Craig Leubben designed the BigBro in 1984 for his Colorado State University Senior Honors Thesis in Mechanical engineering. Mountain Hardware produced the BigBro until Trango took over in 1997.
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↑ Set 100-101, 552: Trango BigBros BRO–1, BRO–2
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↑ 100: Trango BigBro BRO01: 82–108 mm.
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↑ 101: Trango BigBro BRO–2: 102–146 mm.
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↑ Set 635-640: Trango BigBros #.5–#5
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↑ 635: Trango BigBro #.5: 67–83 mm.
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↑ 636: Trango BigBro #1: 83–109 mm.
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↑ 637: Trango BigBro #2: 103–146135 mm.
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↑ 638: Trango BigBro #3: 135–205 mm.
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↑ 639: Trango BigBro #4: 191–305 mm.
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↑ 640: Trango BigBro #5: 285–462 mm.
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↑ 552: Trango BigBro #3: 133–204 mm.