Two-piece tire with improved tire tread belt and carcass

A two-piece tire assembly has a removable tread belt (12) for installing about the circumference of a tire carcass (14). The tread belt has a pair of lateral ends each axially extending beyond the inflated unloaded carcass (14) at the circumferential surface by a distance of at least 4% of the width as measured at the tread belt (12) and carcass (14) interface. The carcass (14) has an abrasion resistant rubber layer (82) at the tread belt interface. The tread belt (12) also has the abrasion resistance tread compound (82) at the carcass (14) interface. The tread belt (12) has a tread portion (80) that includes a tread cap (80A) and a tread base (80B).