Surprising how often this takes place but hardly ever is it the actual tire. I have gone through this with 3 1500 rams since 03. I am getting 2 new 35" KO2s in an hour. A road force balancer said two have hard spots in it . I doubt it will cure it . Once it was a CV shaft on left front of my 03 which I found accidentally by hitting the boot while changing the wheel bearings or what ever they are call now days. Changed wheel bearing , test drove still vibes . I saw the grease mess I made so I swapped the CV axle shaft next morning and vibes gone. I chased that vibe for a year and two sets of 35" tires. Hardly ever do you see a fix listed on the forums for some reason.. The 07 I gave up and traded it in for a JK. Now again with a 14 . I am beginning to think the weight of the new tires are making an existing vibe more noticeable. Other things I have heard that are blames for the vibe are Rotors, big soft OE bushings in lower front control arms tie rod ends, drive shaft , loose pinion nut . Thats all that come to mind right now besides the very rare time it is actually a tire. I find it hard to believe I got two 35-12.50.20 BFG KO2s out of 4. Been using BFG Its since they came out in the later 70s, never an issue before