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.
Performer, UDS, 2011 WSM, Frank-in-Weber, 120 Gallon Offset, IQ-110, ET-732