Cajun Grilled Ribs

4 lbs. beef spare ribs
3 Tbsp. chili powder
3 tsp. black pepper
2 tsp. salt
2 tsp. onion powder
2 tsp. garlic powder
1 tsp. thyme
1 tsp. oregano

Mix together dry ingredients. Trim and clean ribs. Rub ribs with spices and let sit for one hour. Preheat grill. Cook over indirect heat for about 45 minutes. Turn once. Watch carefully to avoid burning. Ribs are done when a knife passes easily into meat between ribs and you can see no or very little pink.