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Imagine how fast Phelps could swim with this!

• matt_heimer 2y ago
  Given that he optimized his training for swimming and not cycling I think he might do better with fins. His top speed of 7.2 - 9.6 km/h is freestyling without fins. He reached somewhere around 13 km/h using a Lunocet monofin.
• space_oddity 2y ago
  I'd watch this