PREPARE grill for indirect medium-low heat (250° F/120 ° C). Sprinkle ribs with spice rub. Place ribs on rib rack or in foil pan. Grill, covered, 2 1/2 to 3 hours until very tender.
MIX Sweet Chili Sauce and BBQ sauce in small bowl.
BASTE ribs with sauce mixture during last 15 minutes of cooking. If desired, grill ribs over direct heat at end of cooking to crisp slightly.
Test Kitchen Tips:
• To ensure that ribs will be very tender, score membrane on underside of ribs with sharp knife.
• When the snow is knee-high deep, bake ribs in a conventional oven at 250°F (120° C) for 3 hours or until very tender. Baste with sauce during last 15 minutes of baking.