Yeah, kinda? They were originally 18" long and 5 wide, that was just a hair too long for the kettle and a few smaller grills so they were shortened to 17" to be on the safe side.
They are still 5" wide. The 4 trays give you 340 sq/in of cooking space, we found that unless you made them really long, like 24", there wasn't much advantage over the 17"-18" ones, and that length wouldn't fit hardly any grills and you still couldn't fit 2 racks of ribs per tray.
Believe it or not, the 17" ones still have enough room to cook 4 racks of st louis style spares or 4 racks or babys, 4 split chickens, 2 halves per tray, 60-70 chicken wings, 20+ thighs, 20+ drums... it really does hold a lot of food. Alright, I'm stopping before I go into full infomercial mode...
If it helps at all, there are still a very few (seriously, I think there's like 3 sets) 18" versions left, they aren't on the site, you'll have to give B-O-B a call if you're interested. And I think he still has a promo for $15 off at check out... promo code RIBS