Used the rib rack this last weekend. The 1 1/2" spacing was too narrow for the baby back ribs from Sams. Some of the ribs got stuck in the rack. Next ones I make will have a 2 1/2" spacing. It will also allow better smokey air flow around each rack of ribs.
22.5 WSM, 120 Gallon Offset, Weber Performer, IQ-110, ET-732