When our motor mover was fitted, we were advised against a pneumatic jockey wheel, as it causes the caravan "to bounce" and the fitter suggested that this could be an issue in a tight space (we come between 2 bungalows with 4" to spare). However, twice now while being on a grass pitch the standard jockey wheel has sunk into the ground making the mover useless, as the caravan becomes stuck by the jockey wheel. Just this week I managed to reverse it out on the mover and this was more successful than going forward. I have also had similar issues on soft stoned hard standings but not actually been stuck. We only really use the mover on site if we really have to as its main use was for at home for coming in and out of the drive. However I am now thinking of changing to a pneumatic jockey wheel to prevent being stuck on site again.