I have 15,880 miles on my BT-45 rear/front.
I'm just shy of 20K miles on the Ax. It has cupping on both sides off center but amazingly no vibration. I'll be into the side wear bars before the center ones. That duel compound (hard center/soft side) really produces some strange tire wear (direct opposite) of the OEM Stone. Should this tire be used on a Trike Application and not be subject to tire lean one could safely expect 28/30K miles of wear! I have another Ax on hand and will be "cross sectioning" the present Ax once it's removed. Not sure about you, but I believe the Ax is a better corner carver than the OEM Stone.

Ride Safe and May The Force Be With You

Bob