True. I wonder how long would it take to get those tires into circulation and replace the majority of tires in service? 5 years to develop new tires and start g

True. I wonder how long would it take to get those tires into circulation and replace the majority of tires in service? 5 years to develop new tires and start getting them into service and 5 more years for the majority of tires to have been worn out and replaced?