It's an impossible question to answer because your mileage may vary. It depends on the tyre, the bike and the rider. My R1150GS will do 7000 miles on a rear Metzler Tourance but only 2500 on a Conti TKC80. What you really should be asking is how old - and I don't know the answer.
I am riding an CB600FS horbet from '92. I have had differnet Battlax tyres. Currently I have BT023. My front tyre will be up for replacement shortly. It has done already 37.500km and they are jsut below 2 mm treat. I think it will be replaced by arround 40.000km 25.000 miles. Prety good you coudl drive them around the world. The rear tyre is on 27.500km and still 3.5 mm :-)
Different bikes, tires, and styles of riding will drive different responses. Rear tire typically gets half as much life as front tire on a sport bike. If you post some specifics you may get more specific answers. I get 3K miles out of a rear tire with Michelin Pilot Powers. Ride safe !
An ore is a rock that contains metal. Iron ore, silver ore, gold ore, is a rock with that specific metal in it. The metal has to be separated from the surrounding material. A rock will be considered an ore if it has an abundant sample of a specific mineral in it.
