Yes they all should go straight. Take the unit on a flat parking lot, (not a road, there are crowns on a road)the unit should run pretty dang straight. Your dealer should have that unit set up when you picked it up. I would suggest going to hustlerturf.com and at the bottom of the page are links to manuals. I would look up the adjustments on tracking and go there. The unit should run true for at least 20 feet straight on. Sometime I find the tires have the same amount of pressure but different diameter do to rubber being harder or softer,.