Very happy with my Yakima Sparetime. I have it on a 275/70/18 (33x11.00 roughly) and I have friends that have it on a 33x12.50 and 35 as well. Even on my tire I use the shortest mounting tube, it comes with 3 sizes so you can use a fairly wide tire I would imagine, depending on your back spacing.
2013 JKU Sahara, Gecko Green, loaded up
10A Springs, Teraflex levling kit, 315/70/17 Duratracs, AEV Pintler wheels, front/rear bumpers and hood