I know that this is an old question, and about the ultramax I cannot say, but I did run an offset dirt chassis at Barnesville for several years and never could quite get it competitive. It was a Twister made in 2003. My experience with the dirt chassis, is that it turns right better than left, however if it is a left turn and it is a wider left hand turn then its okay. If it is a tight corner, like the hairpin and Barnesville, then nose will not turn. I got it much better over time. I could carry a lot of speed into the corner, but on exit it would lose the nose and then it would snap loose. I think my kart would have done better at the street race at Iverness, Flordia, or AMP, or CMP, because they are wider faster tracks and have some right hand turns. They have widened Barnesville up a bit from the last time I was there, so if I were running my old kart and they were running counter clockwise, I would probably do much better with it overall, because they have widened some of it out. I did the clockwise direction in practice one day by myself and was running competitive laptimes that way. If it was me I would not run, but I do not think they will let you anymore anyway at Barnesville, I would not run a lto kart on sprint course. Its too big of a pain in the rear to get it to turn, and it just puts you off a level playing field with everyone else. I have read on here before about people adjusting the camber, but on mine I could not adjust it, because it was build into the kart. I just wish I had bought a sprint chassis to begin with.