1/2 cup granulated sugar
1/8 cup salt
2 tablespoons sweet paprika
1 tablespoon cayenne pepper
2 teaspoons ground cumin
2 teaspoons celery seed

Combine all ingredients and rub over 4-pound tri tip 20 minutes before grilling.

Cook over medium-hot grill 15 minutes on the fat side, 15 minutes on the other side.