Lawnboy offset wheel mowers should push just as straight and true as 4-square models. "IF" the wheels are parallel with each other. Sometimes the wheel arm (that takes the wheel axle bolt) on a given wheel can become bent and cause one wheel to not be parallel, and in that case it won't push straight and true. This is a very easy fix, just rob the part from a junker..or bend the old one (in a vise) back into true.