Prep the ribs. Pat the ribs dry with paper towels. Flip the rack so the bone side is up and gently lift the thin membrane at one corner with a knife, then pull it off with a paper towel for grip. Cut the rack into 2–3 sections so it fits your air fryer.
Mix the rub. In a small bowl, combine brown sugar, paprika, garlic powder, onion powder, salt, pepper, chili powder, and cayenne.
Stir well to break up any clumps.
Season generously. Rub the ribs with olive oil. Coat all sides with the dry rub, pressing it in so it adheres. Let them sit for 10–15 minutes while you preheat.
Preheat the air fryer. Set your air fryer to 375°F (190°C) for 5 minutes to get it hot.
Air fry, round one. Place the rib sections in the basket in a single layer, bone side down, without overcrowding.
Cook at 375°F (190°C) for 15 minutes.
Flip and continue. Carefully flip the ribs bone side up. Cook another 10–12 minutes. They should be browned with some crisp edges.
Sauce and set. Brush the ribs all over with barbecue sauce (stir in a teaspoon of apple cider vinegar if you like it tangy).
Cook at 400°F (205°C) for 5–7 minutes to caramelize the sauce. For extra gloss, brush with a light layer of honey or maple during the last minute.
Check tenderness. The meat should pull back from the bones and feel tender when pierced. If you want them softer, add 3–5 more minutes at 375°F.
Rest and serve. Let the ribs rest for 5 minutes.
Slice between the bones, brush with a little extra sauce, and garnish with herbs if you like. Serve with lime wedges for a pop of brightness.