Make the barbecue rub by mixing all the ingredients together.
Brush olive oil over the ribs then rub in the spice mixture.
Wrap the ribs in plastic wrap and refrigerate for a minimum of 30 minutes.
Fill the grill with apple, cherry, or fruitwood pellets, light, and heat to 270 °F
Unwrap the ribs, place on the grill, and cook for an hour.
Mix together the apple juice, brown sugar, and barbecue sauce and use this to anoint the ribs every 20 to 30 minutes after the first hour.
Let rest for 10 minutes before serving.
The ribs will need around 4 hours of smoking. Once again, check for doneness with a temperature probe.