So a couple weeks ago I noticed my front tires were cupping on the outer tread. (31X10.50X15 BFG all terrains) I took it to the local tire shop to have the tires balanced and rotated. When i got it back the steering wheel would vibrate varying amounts starting around 45 mph and would stop around 75 mph. I took it back to them the next day and had them rebalance them. It still did it even after the 2nd balance so I took it to a new place for a 3rd balance. after this it did it a little less but still does it.
I jacked up the front end and wiggled the tires from top to bottom thinking maybe it was a ball joint or something but there was no play in the wheels. I never had any problems with vibrations in my steering wheel before the rotate/balance.
Could it still be just a balance problem or would rotating the wheel make some other problem show up?
Sorry for the long post, any help will be appreciated. Thanks in advance.