AKRON (Sept. 14)—Michelin North America Inc. plans to move its Tire Centers L.L.C. commercial tire dealership corporate headquarters to Duncan, S.C., from Akron by next summer. The company is constructing a $6 million, 40,000-sq.-ft. building near its Michelin Retread Technologies Inc. facility in Duncan to house the operation, which Michelin acquired last year. The firm said the move will provide "greater synergies" between Tire Centers and Michelin. Tire Centers employs 65 in Akron, and expects many to relocate to South Carolina.