Curious what folks running the Defender LTX tires are getting in the way of tread life? I've got about 30k miles on the tires and they're worn down to 4-5mm already. I've used the same tires on other vehicles and get great tire life, but not so much on this vehicle. Seems like i'll be benefiting from the tread life warranty soon, but not sure if I should stick with the defenders (maybe I got a bad set?) or look for an alternative.