Ku sii qor faqradan - Ciyaaraha Olombikada ee Rio de Janeiro, Chalmers wuxuu ku guuleystay billad dahab ah orodka 100 mitir ee qaabka xorta ah
rikoorka cusub ee ciyaartoyda da'da yar ee 47.58, Australia kii ugu horeeyay ee sidaas sameeya tan iyo Michael Wenden sanadkii 1968. Waxa kale oo uu ku dabaaley waqtigii ugu dhakhsaha badnaa ee heerkulka, isagoo 47.90s jabiyay rikoodhkiisa adduunka ee da'yarta. Tartanka 4x100 mitir ee qaabka xorta ah, wuxuu gacan ka geystay in Australia ay qaadato billad naxaas ah. Isku aadka, wuxuu lahaa kala qaybsanaanta ugu dhaqsaha badan ee garoonka isagoo leh waqti 46.72, kaas oo ka caawiyay kooxda inay ku guuleystaan bilada naxaasta ah. Taariikh ahaan kaliya Pieter van den Hoogenband (46.70 sanadkii 2003), Vladimir Morozov ((46.69 sanadkii 2017), Cameron McEvoy ((46.60 sanadkii 2015) iyo Duncan Scott (46.14 sanadkii 2019 iyo Jason Lezak (46.06 sanadkii 2019) ayaa ka dhakhso badan dharka dabbaasha ee dharka.