About 2 weeks ago I put the Weld Aluminum wheels back on the Pony. Took a trip yesterday and got a lot of vibration when I went over 55, I could stand it at 61, but on the Interstate, 72 was pretty rough. I stopped at the Tire shop that I bought my tires at and they rebalanced them, but it was still no good. They said my wheels were out of round like from hitting a pothole, etc. They had some hop in them. I put the 10 holes back on with the 215/60's and all is smooth again. I don't know what to do. I liked the new wheels, but I am thinking they were too "blingy" or shiny for my Pony. I am also out the $400 I spent on them, but can't really honestly sell them with this problem. Maybe I can sell them for aluminum scrap I am thinking seriously of getting pony's for it in the future and reuse the 16" tires, but not sure of anything yet. Has anyone heard of a machine that puts roadforce on the wheels so that they can be balanced?