NR front-month settled at 20,095 yuan/t, up 5.54% on the day; BR closed at 16,000 yuan/t, up 3.96%. The NR-BR spread widened to 4,095 yuan/t. Seasonal rainfall in southern Thailand and leaf-fall disease in Indonesia tightened supply while Qingdao bonded stocks kept drawing down, pushing up tire makers' spot cost.