11) What is the life cycle of quad bikes in Australia? For example, on average how long do consumers use quad bikes before the vehicle is retired? How long might it take before the current stock of 380,000 quad bikes is replaced by new stock that satisfies requirements of a safety standard, if imposed?
Anecdotal evidence suggests that quad bikes have a long life cycle and can pass through several owners with only major breakdown or irreparable damage leading to retirement.
Waiting for natural attrition could mean a ten year transition period, in which time more people, particularly children and young people remain exposed to the risk.