Another issue is whether the OP has straight or the "bent" lift arms. Maybe all the 3 series have straight ones, I don't know, but the 2 series machines are well known for this issue, even with the wheels set to the widest setting. There is a bent set of lift arms available than basically have a notch that clears the back tires. They are pretty pricy, though, for large chunks of steel bar with swivel eyes on each end.