If you wanted to reduce front tire wear, you could stiffen the centre differential. WIth that setup I'd say put 30-50k in the middle diff and you'll be good. You'll go through tires more evenly, but also, this change will allow you to put more power to the ground, which in turn will cause all 4 tires to wear more, and the fronts will probably still go first. There's no rubber that can take a good 6s pounding, this is way beyond what any of them are designed for. Fun though, isn't it?
