Fastest Ironman Triathlon Splits: Swim, Bike & Run Records

The fastest Ironman triathlon swim split is held by Australian professional triathlete Cameron Wurf, who recorded a time of 44 minutes and 36 seconds at the 2018 Ironman World Championship in Kailua-Kona, Hawaii.

The fastest bike split is held by Swiss professional triathlete Jan van Berkel, who recorded a time of 4 hours, 11 minutes, and 30 seconds at the 2018 Ironman World Championship.

The fastest run split is held by Norwegian professional triathlete Gustav Iden, who recorded a time of 2 hours, 36 minutes, and 25 seconds at the 2022 Ironman World Championship.