Cut the thin membrane from the back of the ribs.
Pat the racks of ribs dry with paper towel.
Cover the front and back of each rib rack with the rib rub. Be sure to get the back and sides of the ribs.
Preheat the Traeger to 165 degrees F.
Place ribs on the bottom grill grate, bone side of the ribs down.
Smoke for 2 hours.
At the 2 hour mark, open the smoker, wrap each rack of ribs in aluminium foil and place back on the grill.
Smoke for 2 more hours at 225 degrees F.
At the four hour mark, remove the ribs from the foil, place back on the grill and baste with BBQ sauce.
Continue to flip and baste the ribs at 15 minute intervals for the last hour.
After a total cook time of five hours, remove the ribs from the grill.
Cut into pieces using a sharp knife.