the seat on my ztr dane chariot hurts my back now . mowed a bumpy yard 3.5 acres . its the part of the seat your back rest on not the bottom .it needs more pad or something. the heavy equipment operators that run those big pans take a beating and do it everyday .there seats aint no differant . but they wear seat belts that keeps them from flying out. wonder if a seat belt would help on ztrs? it would keep you from bouncen all over the seat like i did to day and i never had back pains before. i will check this post out later i got to find the heating pad.