My dad been a mechanic since 65. Changed thousands of tires over the years. He bought a new set of wheels and tires for his 18 foot car trailer. It always had a jerk pull to it and bounced a lot. Still did that with the new tires and wheels. For a whim he pulled all 4 of and took them in to the dealership and balanced them. The trailer is a 1994 and been pulled behind lots of different trucks. He put them back on and pulled the trailer empty and then with a load on it. Both times it was like the trailer was not even behind the truck. No jerking,bouncing or anything. I am going to have to get my balloon 5'x8' enclosed trailer done now just to see if it helps.

corey