I take tyre warranty's with a pinch of salt.
On my Defender I had one BF Goodrich all terrain tyre start chipping and loosing bits of its thread and cracking after about 6000kms. The other three tyres where fine.
I took the vehicle back for inspection. They would not replace the tyre, even partly, as the rep said it was the result of abuse!!
Now how do you abuse one tyre on a permanent 4x4? and if you can how do you do it in a Defender?

I havent bought another BFG again and never will.
Its all marketing thats all and if you expect very little you dont get disapointed.