The coopers were on there when I bought the landy 108k on the lcock and were as new the spare was completely ununsed they lasted about a year and a half I think 114K before i swapped to the BFG Muds
Then I got a puncture front left about a year ago so put on the NEW Cooper to replace and its already worn as much as the front right BFG which has done 30 + k and still have enough life in them to keep going