Ironman 140.6, a triathlon, is one of the world’s toughest endurance races, comprising of three separate athletic disciplines, an open water swim of 3.8 km (2.4 miles), a road cycle ride of 180.2 km (112 miles) and a full marathon run of 42.2 km (26.2 miles), Hyderabad’s athletes Sai Harsha, Pilli Srikanth and Ashwin Aiyangar successfully completed it.