2 tablespoons ancho chili powder
2 tablespoons smoked paprika
2 tablespoons dried oregano
1 tablespoon chipotle chili powder
1 tablespoon garlic powder
1 tablespoon ground mustard
1 tablespoon ground cumin
2 tablespoons kosher salt
1/2 teaspoon freshly ground black pepper
2 (3-pound) slabs pork spareribs
Hickory chips
Southwest Barbecue Sauce, recipe follows
1 tablespoon canola oil
1 yellow onion, diced
3 cloves garlic, diced
2 tablespoons tomato paste
2 tablespoons reserved spice rub
2 cups ketchup
1/4 cup water
1/2 cup apple cider vinegar
1/2 cup peach nectar
1/2 cup light brown sugar
2 tablespoons dry mustard
1 lemon, juiced
1/2 tablespoon Worcestershire sauce
Pinch kosher salt and freshly ground black pepper