Tire recycling when i was much younger .Drive around all day in a 24' truck loading with used tires from all the big box tire shops .We would load and unload truck 2 or 3 times per day .After truck runs done each day we had to sort tires junk went into a truck to go to recycling plant all good tire's had to be sorted by type and grade .Most days started at 5 am and ended at 9 or 10 pm .