I tow our 325R with a F250 with a Pullrite slider. The rear of my truck is also down and considering adding an extra spring or air bags. I also notice my truck rear down when the 5er is not hooked up.
Location: Jersey Shore, New Jersey...Florida in winter
Posts: 236
Sorry. Timbrens. A nice alternative to airbags. No inflation necessary. The link above explains but you will find many links and discussions pro/con Airbags vs Timbrens. I am very happy with them