Discover the biggest truck you can legally drive with an HR licence in Australia. Learn about Heavy Rigid vehicle limits, maximum GVM, axle configurations, trailer towing rules, and the types of trucks covered under an HR licence. This guide explains NHVR regulations, HR licence requirements, career opportunities, and how to progress your truck driving career in South Australia. Find out whether an HR licence is enough for your goals or if upgrading to an HC or MC licence is the next step. Read expert insights from Tokhi Driving Solutions.