Preheat the smoker to 225°F (107°C).
Remove the silver skin from the ribs and pat them dry with a paper towel.
Rub the ribs with olive oil to coat them evenly.
In a bowl, mix together the brown sugar, paprika, black pepper, salt, garlic powder, onion powder, chili powder, cumin, and cayenne pepper.
Generously apply the dry rub to both sides of the ribs.
Place the ribs in the smoker and cook for 3-4 hours, maintaining a temperature of 225°F (107°C).
After 3 hours, check the ribs for tenderness. When they’re nearly done, brush on a layer of BBQ sauce.
Continue smoking for another 30-60 minutes, until the ribs are tender and the sauce has caramelized.
Remove the ribs from the smoker and let them rest for 10 minutes before cutting and serving.