In my experience, lasting that long or longer has been more prevalent in bias ply than radials, but I've seen radials last that long and longer and I can give an example. Remember the 1980s Mazda trucks? Great little trucks and they used Bridgestone tires. Those tires were notorious for having an almost cement hard tread compound. Lots of people swapped them out because of road noise and ride harshness. But those that left them on got extraordinary mileage out of them. I remember when I was young working at a local tire shop guys would come in shakin their heads sayin "well, they been on here 12 years so I guess I better get some more"......and there STILL be over half the tread left. Michelin tires from that same era were similar. The tread would outlast the tire carcass.