At the Ironman South American Championships victor Canadian Brent McMahon broke the course record and came within a whisker off the current Ironman record, just missing it by 12 seconds.
A group of ten men exited the swim within a minute of each other, and led by Marcus Fernandes (BRA), including Brent McMahon and Tim Don (GBR).
Early into the bike the skies opened and began to pound competitors with rain making for treacherous and cold conditions through most of the bike. Amorelli, Wil Clarke (GBR), Collington, Fontana, Mathews, and McMahon took advantage of the circumstances and began to pull away from the field. At 55 km’s, Amorelli and McMahon separated themselves to the front of the race with Mathews, Collington, and Don falling back but still remaining within striking distance of the lead pair. Nearing the completion of the first half of the bike, McMahon managed to create a minute and half gap on Don, Mathews, Amorelli, and Collington