I agree with Mitutoyo being the top of the line, and you don't need to spend a lot for wheel truing. I have a couple that I got from the local Harbor Freight that are more that "good enough" for wheels. If I were to be indicating something in a lathe, then a better quality would be in order. I would recommend sticking a piece of plastic tubing over the end of the indicator points to prevent scratching your rim....especially the aluminum and/or anodized rims.