I have installed Timbrens before and I did not have to remove any wheels/tires. There is enough room to install them from underneath and the inside to not have to remove the tires. As for track bars, I seem to get more wag with the toad on the back than without it. The little amount of play in the receiver hitch, tow bar movable joints and the attachment to the toad, all add up to a bit of movement from the toad, following the road surface. I have tried to eliminate the movement by tightening the joints, but you cannot move the tow bar, and the you can feel the toad pulling at the back with it that tight.