I just bought a Thule sidearm and, contrary to what the folks at the shop said, the tray does not seem to accomodate a 2.7 tire. I know, if I had done my homework, I would have read on the Thule website that the tray accommodates tires up to 2.6... well I have a 2.5 (both Nevegals) on the back and the rear tire still does not fit soundly in the tray. The knobs have to hang over the side a bit. Is this a major problem? I haven't mounted it yet to test its stability in use, because I may want to take it back. Does anyone out there have any experience with a Thule Sidearm tray and fat tires? Any info would be greatly appreciated. PS - I'm stuck with the Thule Crossroad rack, so my only other option would be a Yakima HighRoller attached to my Thule crossbars. Thanks for any tips.