Hi Alan, I have checked the tyre pressure and it was ok. Basically by pushing down on the supension both rear dumpers do their job but as they recoil the one I mentioned does it to a less extent and it does not fully extend to the same height as the left one leaving the rear dipped to the right. Just by pulling the arch up by hand anyone could tell that the dumper/coil spring are not working well as the gap disappears! I hope it makes sense... :unsure: