A tire inventory decision support system (100) optimizes tire allocations across a plurality of trade areas for local tire dealers, as well as regional trade areas for tire repositories as regional fulfillment hubs. The system defines trade areas having demographic tire demand characteristics and corresponding to an available inventory population for respective dealers. For each trade area, optimal dealer inventory populations are projected for tire sizes and brands, based in part on the available inventory population for the dealer an actual inventory population for the associated tire repository. The system compares the optimal inventory population for each dealer to actual inventory population, and selectively generates dealer interfaces displaying recommendations for tire inventory modification based on value propositions as disparities between the optimal and actual inventory populations. The system may further identify value propositions for inventory reallocation by regional hubs themselves, based on aggregated inventory for associated dealers.